[ both ] [ bulbs a and c ] [ still ] [ have ] [ a closed path ] [ terminal 1 and the positive terminal ] [ are connected. ] [ positive battery ] [ is seperated ] [ by a gap ] [ from terminal 2 ] [ There ] [ is ] [ no difference ] [ between the two terminals. ] [ the switch ] [ has to be contained ] [ in the same path ] [ as ] [ the bulb and the battery ] [ there ] [ is ] [ a gap ] [ in terminal 1 ] [ The battery ] [ uses ] [ the chemical reation ] [ to create ] [ voltage ] [ a batter ] [ uses ] [ a chemical reaction ] [ to create ] [ voltage ] [ the battery ] [ alone ] [ is ] [ in a closed path ] [ Because ] [ there ] [ is ] [ a gap ] [ in the circuit. ] [ Bulbs A and B ] [ are not ] [ within the same path ] [ as ] [ bulb C. ] [ because ] [ there ] [ was ] [ two negative connections ] [ bulb a ] [ is ] [ on a closed path ] [ with the battery ] [ the other terminals ] [ are connected ] [ to the positive terminal. ] [ The bulb ] [ takes away ] [ the path. ] [ There ] [ is ] [ no gap ] [ between the positive terminal and terminal 4 ] [ Bulb a ] [ created ] [ a gap ] [ terminal 6 ] [ is connected ] [ to the positive terminal ] [ of the battery ] [ the bulb ] [ is ] [ in a closed circuit ] [ The circuit ] [ is not closed ] [ around the battery. ] [ the bulb ] [ is not contained ] [ in a closed path. ] [ There ] [ is ] [ a gap ] [ in the circuit. ] [ Bulb B and bulb C ] [ are ] [ still ] [ on closed paths ] [ with the battery. ] [ Bulb A ] [ has ] [ a closed pathway ] [ bulbs a and c ] [ are not ] [ in the same closed path ] [ as ] [ bulb b ] [ Only one terminal ] [ is involved ] [ in the circuit. ] [ there ] [ was ] [ closed paths ] [ between the battery ] [ the gap ] [ separates ] [ the positive battery terminal from terminal 2 ] [ bulb a, bulb b, and bulb c ] [ are contained ] [ in differentclosed paths. ] [ If ] [ any bulb ] [ is ] [ out, ] [ it ] [ affects ] [ the whole system ] [ and ] [ everything ] [ is blocked ] [ from the battery. ] [ it ] [ is not ] [ in the same path. ] [ There ] [ will be ] [ a gap in the path ] [ Bulb B and C ] [ are ] [ still ] [ contained ] [ in a path ] [ with the battery ] [ bulbs a and c ] [ are ] [ still ] [ contained ] [ in a closed path ] [ with the battery. ] [ Terminal one ] [ is not connected ] [ to the positive battery terminal ] [ bulb A and switch Z ] [ are ] [ in a closed path ] [ Terminal 5 ] [ is connected ] [ to the postitive battery terminal ] [ Terminal 6 ] [ is connected ] [ to the positive battery terminal ] [ the red x ] [ means ] [ that ] [ the circuit ] [ is not ] [ safe. ] [ both ] [ bulbs B and C ] [ are ] [ in the same path ] [ as ] [ bulb A ] [ if ] [ the electrical state ] [ is ] [ non-zero ] [ you ] [ can find ] [ the gap ] [ in the circuit ] [ The battery ] [ is contained ] [ in a closed circuit ] [ and ] [ there ] [ is ] [ nothing ] [ in its pathway ] [ A terminal ] [ is not connected ] [ to the positive battery terminal. ] [ there ] [ is ] [ a gap ] [ in the circuit ] [ the positive terminal ] [ is not seperated ] [ by a gap ] [ from terminal 5 ] [ You ] [ can ] [ find ] [ where ] [ there ] [ is ] [ a gap ] [ has to do ] [ something ] [ with a gap ] [ Because ] [ the positive circuit ] [ has ] [ a voltage ] [ of 1.5 volts. ] [ There ] [ is ] [ a chemical reaction. ] [ when ] [ the switch ] [ is ] [ the ] [ in a closed path ] [ with the bulb ] [ bulb b and c ] [ are ] [ in a closed path ] [ There ] [ is ] [ a difference ] [ in electrical states. ] [ the bulb ] [ will not light ] [ bulb a and c ] [ are contained ] [ on the same path ] [ with the battery ] [ The path does not close ] [ The difference ] [ between the electrical states ] [ is ] [ 1.5 volts ] [ there ] [ is ] [ still ] [ a closed path ] [ a gap ] [ causes ] [ a lost connection ] [ the positive terminal and terminal 6 ] [ are connected ] [ the positive terminal ] [ is connected ] [ to terminal 6 ] [ Because ] [ there ] [ is no gap ] [ at terminal 1 ] [ terminal 6 ] [ is conncted ] [ to the positive terminal ] [ When ] [ the switch ] [ is ] [ in the same papth ] [ as ] [ the bulb. ] [ Bulbs A and C ] [ are ] [ in separate paths. ] [ bulb a and bulb b ] [ are ] [ still ] [ in a closed path ] [ with the battery. ] [ The positive battery terminal ] [ was not separted ] [ by a gap ] [ from terminal 6 ] [ A GAP ] [ WIL BE CREATED ] [ bulb a and c ] [ are contained ] [ in different paths ] [ with the battery ] [ The positive terminal ] [ is connected ] [ to terminal 4. ] [ not contained ] [ inthe same path ] [ bulb c ] [ does not create ] [ a gap in the path ] [ for bulb b and a ] [ becuase ] [ the other terminals ] [ are connected ] [ to the positive battery terminal ] [ because ] [ terminal one and the positive battery terminal ] [ are on a closed path ] [ Battery ] [ will ] [ always ] [ have ] [ voltage. ] [ the terminals ] [ are not connected ] [ the positive battery terminal ] [ is connected ] [ to terminal 6 ] [ bulb a ] [ was ] [ on a closed path ] [ Because ] [ terminal 4 ] [ is connected ] [ to the negative terminal ] [ bulb c ] [ is ] [ in its own pathway ] [ the voltage ] [ is ] [ nearest the burnt out bulb ] [ You ] [ needed ] [ both ] [ a battery and a blub ] [ with the same path, ] [ and ] [ the path ] [ must be ] [ closed ] [ Because ] [ the battery ] [ runs ] [ in a closed circuit. ] [ If ] [ bulb B ] [ is ] [ damaged, ] [ then ] [ the circut ] [ is ] [ no longer ] [ closed. ] [ terminal 1, terminal 2, and terminal 3 ] [ are connected ] [ o the negative battery ] [ "Because ] [ it ] [ didn""t cause ] [ a gap." ] [ because ] [ there ] [ is ] [ a gap ] [ between terminal 1 and terminal 6. ] [ because ] [ bulbs b and c ] [ are ] [ on a closed path ] [ with the battery ] [ The switch ] [ determines ] [ whether ] [ the path ] [ is ] [ open or closed. ] [ the positive battery terminal ] [ is separated ] [ by a gap ] [ from terminal 4 ] [ an incomplete circuit ] [ would not effect ] [ the the electrical state ] [ between the terminals. ] [ terminals 4, 5, and 6 ] [ are connected ] [ to the positive battery terminal ] [ The path ] [ it ] [ was ] [ on ] [ If ] [ the bulb ] [ is ] [ on the same closed path ] [ bulb a ] [ was ] [ still ] [ contained ] [ in a closed path ] [ with the battery. ] [ If ] [ one bulb ] [ is removed, ] [ the others ] [ stop ] [ working ] [ because ] [ all the terminals ] [ are connected ] [ to other terminals, ] [ an open switch ] [ disrupts that. ] [ There ] [ is a gap ] [ between the two bulb terminals ] [ a short circuit ] [ has occured ] [ there ] [ will be ] [ a gap ] [ at bulb b, ] [ thus ] [ affecting ] [ the rest ] [ of the circuit ] [ terminal 3 and the positie terminal ] [ are not connected. ] [ The positive battery terminal ] [ was not seperated ] [ by a gap ] [ from terminal 4. ] [ Terminal 1 ] [ is connected ] [ to the negative terminal. ] [ A terminal ] [ is not connected ] [ to the positive battery terminal. ] [ the positive terminal and terminal 2 ] [ are seperated ] [ by a gap ] [ there ] [ is not gap ] [ between the terminals ] [ there ] [ is ] [ a gap ] [ between teh positive battery terminal and terminal 4. ] [ The positive battery ] [ was not connected ] [ to terminal one. ] [ Bulbs A and B ] [ will ] [ still ] [ be contained ] [ in a closed path ] [ to the battery. ] [ the two components ] [ are seperated. ] [ because ] [ terminal 1 ] [ is ] [ directly ] [ connected ] [ to terminal 4 ] [ the positive battery terminal and terminal 4 ] [ are connected ] [ Terminal 1 and terminal 2 ] [ are on the same side. ] [ not connected ] [ to positive battery ] [ The battery ] [ uses ] [ a chemical reaction ] [ to maintain ] [ the voltage, ] [ Because ] [ the bulb ] [ does not have ] [ a closed path. ] [ there ] [ is ] [ a difference ] [ in electrical states ] [ terminal ] [ is connected ] [ to postive terminal of the battery ] [ Terminal 1 ] [ is seperated ] [ from the positive terminal ] [ Battery ] [ is not contained ] [ i a closed path. ] [ terminal 1 ] [ was connected ] [ to the positive battery terminal ] [ There ] [ are ] [ 2 paths ] [ in this diagram ] [ Because ] [ the switch ] [ was connected ] [ to the closed circuit ] [ damaged bulb ] [ creates ] [ a gap. ] [ that ] [ the battery connection does not work ] [ because ] [ the terminals ] [ are not connected ] [ Terminal 5 ] [ is connected ] [ to teh positive battery terminal ] [ terminal 1 ] [ was connected ] [ to the positive terminal ] [ there ] [ is ] [ a gap ] [ between terminal one and two and the positive battery terminal ] [ bulbs b and c ] [ are contained ] [ on the same path ] [ with the battery ] [ because ] [ there ] [ is no closed path ] [ to the battery ] [ terminal 1 ] [ is not connected ] [ to the positive battery terminal ] [ the battery ] [ is not ] [ in a closed bath ] [ alone ] [ terminal 5 ] [ is connected ] [ to postive terminal of the battery ] [ if ] [ x and z ] [ are closed ] [ then ] [ it ] [ will create ] [ a closed path ] [ positive terminal ] [ is serperated ] [ from terminal 2 ] [ the battery ] [ is not closed ] [ the bulb ] [ is. ] [ there ] [ is not ] [ a gap ] [ in the connection ] [ if ] [ a bulb ] [ is ] [ in a closed circuit ] [ with a battery and a switch ] [ the switch ] [ will affect ] [ the bulb. ] [ bulbs b and c ] [ were contained ] [ in a closed path ] [ with the battery. ] [ Because ] [ neither components ] [ are ] [ in closed paths. ] [ you ] [ can ] [ see ] [ where ] [ the gap ] [ is ] [ if ] [ there ] [ is ] [ a gap ] [ in the circuit ] [ there ] [ the bulb ] [ will not light up. ] [ Bulb A and Bulb B and the battery ] [ are ] [ in a closed path. ] [ That ] [ there ] [ is ] [ a gap ] [ if ] [ the switch and bulb ] [ are contained ] [ in the same path, ] [ the switch ] [ will affect ] [ the bulb. ] [ Voltage ] [ is ] [ the difference ] [ between a positive and negative end on a battery. ] [ the path ] [ passes ] [ the energy ] [ through the switch ] [ that ] [ the bulb terminal and battery terminal ] [ are ] [ on the same side of a disconnected circut ] [ Because ] [ the battery ] [ is not ] [ in a closed path. ] [ switch x ] [ is ] [ in the closed path ] [ with bulb a ] [ There ] [ was ] [ a closed circuit ] [ "because ] [ switch z ] [ is ] [ in bulb c""s ] [ closed path" ] [ Bulb A ] [ was ] [ still ] [ in a closed path ] [ Because ] [ there ] [ is ] [ a gap ] [ due to ] [ a damaged bulb. ] [ Bulb A ] [ was ] [ still ] [ in a closed path ] [ with the battery ] [ The battery and light bulb ] [ are not contained ] [ in a close path ] [ and ] [ the circut ] [ is closed ] [ "becuase ] [ bulb C ] [ is ] [ on it""s own pathway." ] [ if ] [ bulb A ] [ burns out ] [ then ] [ bulbs B and C ] [ will no longer be ] [ in a closed path. ] [ Terminal 1 ] [ is not connected ] [ to the positive terminal. ] [ because ] [ the battery ] [ is not ] [ in a closed circuit ] [ the terminal ] [ it ] [ is connected ] [ to ] [ is not working ] [ There ] [ must be ] [ a closed path and a battery. ] [ terminal ] [ is connected ] [ to terminal 6 ] [ because ] [ bulb a ] [ is ] [ in a closed circuit ] [ with the battery and switch x ] [ If ] [ the path ] [ is not ] [ closed, ] [ the switch ] [ will not affect ] [ the bbulb ] [ bulb b and c ] [ are ] [ on a closed path ] [ to the battery ] [ since ] [ a a gap ] [ does not affect ] [ the voltage of a battery ] [ Because ] [ there ] [ is ] [ a light bulb ] [ the bulb ] [ will be burned out ] [ because ] [ the terminals ] [ Because ] [ the positive batter terminal and terminal 6 ] [ were connected. ] [ because ] [ the the circuit ] [ is complete. ] [ Bulbs B and C ] [ will ] [ still ] [ be ] [ on closed paths ] [ with the battery ] [ the bulb ] [ is contained ] [ in an closed circuit ] [ THE ] [ ARE ] [ ON THE SAME PATH ] [ Bulb a and switch Y ] [ are not ] [ in the same path. ] [ A chemical reaction ] [ inside the battery ] [ makes ] [ the electrical states ] [ of the positive and negative terminals ] [ different ] [ at all times. ] [ becasue ] [ the terminals 4,5, and 6 ] [ are connected ] [ to the positive terminal of the battery ] [ switch Y ] [ does not effect ] [ bulb A ] [ bulb c ] [ creates ] [ a gap ] [ Bulb C and the battery ] [ are not contained ] [ in a closed pathway ] [ the two terminals ] [ will ] [ both ] [ be ] [ 0 ] [ bulb b ] [ is not ] [ in the same path ] [ with bulbs a and c. ] [ The electrical state ] [ is interferred ] [ with. ] [ Because ] [ the battery and the bulb ] [ are not ] [ in a closed path. ] [ "because ] [ by measuring ] [ voltage, ] [ you ] [ find ] [ the gap ] [ where ] [ there""s a difference ] [ in electrical states." ] [ again, ] [ bulbs a and b ] [ will be contained ] [ on a closed path ] [ bulbs b and c ] [ are contiained ] [ in the the same path ] [ with the battery. ] [ There ] [ is ] [ a gap ] [ in the path. ] [ bulb a ] [ is ] [ in a closed path ] [ with a battery ] [ Bulb A and bulb C ] [ affect ] [ each other. ] [ switch z ] [ is contained ] [ in a closed path ] [ the bulb terminal and the negative battery terminal ] [ are separated ] [ by a gap ] [ Bulb A and C ] [ are ] [ still ] [ in a closed path ] [ with the battery. ] [ if ] [ switch and bulb ] [ are contained ] [ in the same closed path ] [ there ] [ is ] [ a gap ] [ between the positive battery connection and the bulb terminal. ] [ Bulb A ] [ is not ] [ on the same path ] [ that ] [ Bulb B and bulb C ] [ are. ] [ it ] [ runs ] [ on a different current ] [ terminal 6 ] [ is connected ] [ to the difference ] [ the batteries terminals ] [ are not connected ] [ because ] [ if ] [ there ] [ is ] [ a voltage ] [ that ] [ means ] [ there ] [ is ] [ a gap ] [ Find ] [ where ] [ there ] [ are ] [ different electrical states ] [ circuit 2 ] [ is connected ] [ to the battery ] [ the gap ] [ in the circuit ] [ causes ] [ the circuit ] [ to be ] [ an open circuit ] [ there ] [ is ] [ a gap ] [ in the circuit ] [ the path ] [ has to be closed ] [ for the bulb ] [ to light up ] [ There ] [ is ] [ no gap ] [ so ] [ there ] [ is ] [ no difference ] [ in voltage ] [ Voltage ] [ is ] [ the difference ] [ between a positive and negative end on the battery. ] [ bulb ] [ had ] [ a short circuit ] [ Bulb A and bulb C ] [ are ] [ in a closed path ] [ with the battery. ] [ Terminals 4, 5, and 6 ] [ are ] [ only ] [ connected ] [ to the positive battery terminal. ] [ a terminal ] [ is connected ] [ to the positive battery terminal ] [ because ] [ the terminals ] [ are ] [ in the same state ] [ "because ] [ switch y ] [ isn""t included ] [ in bulb A""s ] [ closed path" ] [ the negative battery terminal ] [ is seperated ] [ by a gap ] [ from terminal 6 ] [ that ] [ the bulb terminal ] [ is ] [ only ] [ connected ] [ to one of the battery terminals ] [ there ] [ was ] [ a negavtive gap ] [ terminal ] [ is connected ] [ to postive end of battery ] [ terminal 1 ] [ is connected ] [ to the 1.5 volt battery. ] [ The path ] [ must be ] [ closed ] [ Bulbs B and C ] [ are contained ] [ on the same path ] [ with the battery. ] [ a terminal ] [ is connected ] [ to the positive terminal ] [ of the battery ] [ because ] [ a and b ] [ are ] [ in series ] [ and ] [ a and c ] [ are ] [ in parallel ] [ a terminal ] [ is connected ] [ to the positive terminal ] [ of the battery ] [ the bulb ] [ is not contained ] [ in the path ] [ because ] [ positive charge ] [ is ] [ before ] [ gap ] [ Because ] [ it ] [ is not ] [ on the same path ] [ Seperate paths ] [ connected ] [ to the battery ] [ A red X ] [ means ] [ the battery ] [ is ] [ in a short circuit. ] [ The battery ] [ is not closed ] [ in a closed path. ] [ terminal ] [ is connected ] [ to the battery ] [ Bulb A and Bulb C ] [ are not contained ] [ in the same closed path ] [ bulbs A and C ] [ are not ] [ on the same closed path. ] [ bulb, battery, and switch ] [ are ] [ in closed path ] [ the paths of the circuit ] [ are no longer ] [ complete ] [ there ] [ is ] [ no closed path ] [ in circuit 4. ] [ The battery ] [ keeps ] [ a chemical reaction reaction. ] [ There ] [ is ] [ always ] [ a difference in voltage ] [ between two battery terminals. ] [ terminal 1is ] [ connected ] [ to terminal 4 ] [ Bulb A and B ] [ will ] [ still ] [ be ] [ in a contained path. ] [ bulb a ] [ is ] [ in a closed circuit ] [ with the battery ] [ without the y switch. ] [ different paths ] [ with the battery ] [ "The electrical state ] [ at the terminal ] [ matches ] [ the battery""s ] [ electrical state" ] [ Circuit 2 ] [ is not ] [ a short circuit ] [ because ] [ the battery ] [ is not ] [ in a closed path ] [ with itself. ] [ Bulb A ] [ is ] [ on a closed circut path ] [ Bulb B and bulb C ] [ are contained ] [ in different paths ] [ with the battery ] [ the battery ] [ always ] [ has ] [ a voltage ] [ because ] [ there ] [ is ] [ a positive terminal ] [ and ] [ there ] [ is ] [ a negative terminal. ] [ gap ] [ between 3 and positive battery ] [ because ] [ bulbs A and C ] [ are contained ] [ in different paths ] [ with the battery ] [ because of the gap ] [ at bulb b ] [ because ] [ bulb c ] [ was ] [ in an open path ] [ It ] [ is ] [ not ] [ a closed path ] [ because ] [ switch y ] [ is not conatined ] [ in the closed path ] [ of bulb a and the battery. ] [ A terminal ] [ is not connected ] [ to the negative battery terminal. ] [ bulb B and C ] [ both ] [ still ] [ are ] [ on a closed path ] [ with the battery ] [ terminal 1 and terminal 6 ] [ are seperated ] [ by a gap ] [ because ] [ the battery ] [ is ] [ in a closed path. ] [ complete path ] [ including ] [ a battery and a bulb ] [ bulbs b and c ] [ creat ] [ a gap ] [ in the path ] [ the positive battery terminal and terminal 5 ] [ are connected ] [ the the bulb terminal ] [ disconnected ] [ from the battery terminal ] [ the battery ] [ is contained ] [ in the circuit ] [ and ] [ the light bulb ] [ is not ] [ because ] [ the two ends ] [ of the battery ] [ do not connect ] [ to one another ] [ When ] [ a switch ] [ is ] [ open ] [ the circuit is no longer complete ] [ if ] [ both bulbs ] [ are contained ] [ within a closed path ] [ The bulb ] [ is ] [ in a closed circuit ] [ and ] [ the battery ] [ exists ] [ in that circuit ] [ the closed path ] [ is connected ] [ to the light bulb ] [ the electrical states ] [ between the terminals ] [ is ] [ the same, ] [ resulting ] [ in 0 ] [ bulb b and bulb c ] [ are contained ] [ within a closed path ] [ circuit 5 ] [ is ] [ in a closed path. ] [ terminal 6 ] [ is connected ] [ to terminal 1 ] [ If ] [ bulb B ] [ is damaged ] [ there ] [ is ] [ a gap ] [ in the circuit ] [ bulb a ] [ is ] [ in a complete circuit ] [ with the battery ] [ when ] [ switch z ] [ is closed. ] [ bulb a ] [ is ] [ on a closed path ] [ with the battery ] [ because ] [ those terminals ] [ are connected ] [ to the positive terminal of the battery. ] [ Not contained ] [ in a closed path ] [ terminal ] [ connected ] [ to positive charge ] [ because ] [ voltage ] [ measures ] [ the difference between two points ] [ Bulbs a and c ] [ are ] [ in separate paths. ] [ terminal 6 ] [ is connected ] [ to postive terminal ] [ of battery ] [ a terminal ] [ is connected ] [ to the negative battery terminal ] [ Switch Z ] [ is ] [ in the same path ] [ as ] [ bulb A ] [ there ] [ will be ] [ a gap ] [ because ] [ each bulb ] [ has ] [ its own complete path ] [ bulbs b and c ] [ have ] [ separate paths ] [ within the closed circuit ] [ A terminal ] [ is connected ] [ to a bulb. ] [ the positive battery terminal ] has no gaps [ from terminal 4 ] [ when ] [ a switch and bulb ] [ are ] [ whithin a closed path ] [ because ] [ the path ] [ is ] [ short ] [ Bulb A ] [ will ] [ no longer ] [ be completing ] [ the circuts. ] [ Bulb C ] [ will create ] [ a gap ] [ in the path ] [ bulb a ] [ was contained ] [ on a closed path ] [ with the battery ] [ Terminal 1 ] [ is connected ] [ to terminl 4. ] [ Bulbs A and B ] [ are not ] [ on the same path ] [ as ] [ Bulb C. ] [ Each circuit ] [ must have ] [ a connection. ] [ A switch ] [ contained ] [ in a closed path ] [ with a bulb and a battery ] [ will affect ] [ the bulb. ] [ Voltage ] [ is ] [ the difference ] [ between a positive and negative terminal ] [ on the battery. ] [ bulbs b and c ] [ were ] [ in a closed paty ] [ with the battery. ] [ can ] [ complete ] [ the path ] [ by having ] [ z ] [ be closed ] [ A switch ] [ will affect ] [ a bulb ] [ it ] [ the bulb and the switch ] [ are ] [ in the path ] [ as ] [ the battery ] [ the positive battery terminal ] [ is not connected ] [ Bulb A and bulb C ] [ are ] [ still ] [ on a closed path ] [ that ] [ contains the battery. ] [ Bulbs A and C ] [ will ] [ still ] [ be ] [ on their own completed circuts. ] [ The damaged bulb B ] [ has left ] [ a gap ] [ in the path ] [ so ] [ the charge ] [ can not reach ] [ it ] [ the terminal ] [ is separated ] [ from the battery terminal ] [ a terminal ] [ is connected ] [ to another terminal ] [ bulb A ] [ is connected ] [ to switch Z ] [ there ] [ is ] [ a closed path, ] [ with switch z, ] [ that ] [ contains ] [ bulb a and the battery ] [ Terminal 4, terminal 5, and terminal 6 ] [ are connected ] [ to the positive terminal ] [ Circuit 2 ] [ is not ] [ a short circuit ] [ because ] [ the battery ] [ is not connected ] [ to itself. ] [ Because ] [ terminal 1 ] [ is seperated ] [ from the positive battery terminal. ] [ bulb a and bulb c ] [ are contained ] [ in different paths ] [ with the bttery. ] [ because ] [ bulb a ] [ is ] [ in a closed path ] [ with the battery. ] [ the positive terminal ] [ is connected ] [ to the bulb ] [ because ] [ bulb a ] is in a closed path, [ and bulb c ] is in a closed path. [ The positive terminal ] [ has ] [ 1.5 V ] [ because of the chemical ] [ in the battery ] [ Both components ] [ need to be ] [ in closed paths. ] [ bulb a and bulb c ] [ are wired ] [ in parallel ] [ Bulb terminals 3 and 4 ] [ the other bulb ] [ will not light. ] [ because ] [ there ] [ was ] [ a gap ] [ in the terminals ] [ if ] [ the switch ] [ is ] [ open ] [ in a path ] [ with the battery and bulb. ] [ 4, 5, and 6 ] [ are connected ] [ to the positive side ] [ a voltage reading ] [ of 0 volts ] [ indicates ] [ a gap ] [ in the circuit. ] [ 4 5 and 6 ] [ are not connected ] [ to negative battery terminal ] [ bulbs a and b ] [ are ] [ still ] [ contained ] [ on a closed path ] [ with the battery ] [ bulbs a, b, and c ] [ are ] [ all ] [ in the same path. ] [ a and c ] [ are ] [ on the same closed path ] [ with the battery ] [ "if ] [ the switch ] [ is included ] [ in the bulb""s ] [ closed path, ] [ then ] [ the switch ] [ being ] [ open ] [ will affect ] [ the bulb" ] [ because ] [ the outcome ] [ of the bulb ] [ will not affect ] [ each other ] [ not seperated ] [ by a gap ] [ because ] [ terminal 1 and the neavtive terminal ] [ are seperated. ] [ Because ] [ their ] [ is ] [ a gap ] [ between A and C ] [ now. ] [ Bulb A and bulb b ] [ are ] [ still ] [ contained ] [ in closed paths ] [ with the battery ] [ B and C ] [ are not ] [ in the same circuit ] [ as ] [ A. ] [ there terminals ] [ are separated ] [ by a gap ] [ when ] [ the voltage ] [ jumps ] [ from 0 ] [ to 1.5. ] [ bulbs a b and c ] [ are ] [ on a closed path ] [ I ] [ think ] [ the red X ] [ means ] [ that ] [ this ] [ is ] [ dangerous ] [ and ] [ should ] [ never ] [ happen ] [ unless ] [ something ] [ is ] [ seriously ] [ wrong. ] [ because ] [ there ] [ was ] [ no gap ] [ from the positive terminal ] [ of the battery ] [ bulbs A and B ] [ are ] [ still ] [ connected ] [ to the closed path ] [ containing the battery ] [ if ] [ the switch and the bulb ] [ are ] [ in the same path ] [ bulb c and switch z ] [ are ] [ in the same closed path ] [ the bulb ] [ only ] [ has ] [ one terminal ] [ connected ]