Bulbs A and C are still in closed paths Terminal 1 and the positive terminal are separated by the gap Terminal 2 and the positive terminal are separated by the gap The terminals are in the same state. The switch and the bulb have to be in the same path Terminals 1 and 2 are in the same electrical state A battery uses a chemical reaction to maintain different electrical states at the terminals A battery uses a chemical reaction to maintain different electrical states at the terminals The battery is contained in a path which does not contain any other components there is a gap in the circuit Bulb C is in a separate path Terminals 1 and 2 are connected there is a path containing A and a different path containing B and C Terminals 4, 5 and 6 are connected to the positive battery terminal there is an open path Terminal 4 and the positive terminal are not separated by the gap If bulb A burns out, neither B nor C is in a closed path Terminal 6 and the positive terminal are connected the battery is in an open path The battery in 2 is not in a closed path The battery is contained in a path which does not contain any other components there is a gap in a circuit bulbs A and B are still in closed paths with the battery Bulb A was still contained in the same closed path with the battery. Bulb B is in a separate path The battery in 2 is not in a closed path Bulb A was still contained in the same closed path with the battery. Terminal 2 and the positive terminal are separated by the gap A and C are in different paths with the battery each bulb is in its own path Bulb A is still in a closed path with the battery If bulb A burns out, neither B nor C is in a closed path bulbs B and C are still in closed paths with the battery Bulbs A and C are still in closed paths with the battery Terminal 1 and the positive terminal are not connected Bulb A is still contained in a closed path with the battery and switch Z. Terminal 5 and the positive terminal are connected Terminal 6 and the positive terminal are connected there is a short circuit If bulb A burns out, neither B nor C is in a closed path A non-zero voltage means that there is a gap The battery is contained in a closed path which does not contain any other components Terminals 1 and 4 are connected Terminals 1 and 4 are connected Terminal 5 and the positive terminal are not separated by the gap Measuring voltage indicates whether two terminals are separated by a gap. Terminal 2 and the positive terminal are separated by the gap Terminal 1 and the positive terminal are separated by the gap A battery uses a chemical reaction to maintain different electrical states at the terminals When the switch and the bulb are contained in the same path B and C are in the same path the terminals are not connected there is no gap between the terminals A and C are not in the same path with the battery the battery is in an open path Terminal 1 and the positive terminal are separated by the gap If bulb A burns out, bulbs B and C are still in a closed path A non-zero voltage means that the terminals are not connected. Terminal 6 and the positive terminal are connected Terminal 6 and the positive terminal are connected terminal 1 is connected to the negative battery terminal Terminal 6 and the positive terminal are connected When the switch and the bulb are contained in the same path A and C are in different paths bulbs A and B are still in closed paths with the battery Terminal 6 and the positive terminal are not separated by the gap If bulb A burns out, neither B nor C is in a closed path A and C are in different paths with the battery Terminal 4 and the positive terminal are connected If C burns out, then A and B are still in a closed path. If C is damaged, A and B are still in a closed path Terminals 4, 5 and 6 are connected to the positive battery terminal terminal 1 is connected to the negative battery terminal A battery uses a chemical reaction to maintain different electrical states at the terminals Terminal 1 and the positive terminal are not connected Terminal 6 and the positive terminal are connected Bulb A is still contained in a closed path with the battery. Terminal 4 and the positive battery terminal are in the same electrical state Bulb C is in a separate path Measuring voltage indicates the place where the electrical state changes due to a damaged bulb. there is a closed path containing both the bulb and a battery there is an incomplete circuit there is no closed path Terminals 1, 2 and 3 are connected to the negative battery terminal each bulb is in its own path There is a gap between terminals 1 and 6 Bulb B and Bulb C were still contained in the same closed path with the battery. If a bulb and a switch are in the same path the switch affects the bulb Terminal 4 and the positive battery terminal are in the same electrical state A battery uses a chemical reaction to maintain different electrical states at the terminals Terminals 4, 5 and 6 are connected to the positive battery terminal there is a path containing both Z and C The damaged bulb and the other bulb must be contained in the same path Bulb A was still contained in the same closed path with the battery. A and C are in the same closed path the open switch creates a gap the terminals are separated by a gap there is a short circuit bulb B creates a gap Terminal 3 and the positive terminal are not connected Terminal 4 and the positive terminal are not separated by the gap terminal 1 is connected to the negative battery terminal Terminals 1 and 2 are connected Terminal 2 and the positive terminal are separated by the gap terminal 1 is connected to the negative battery terminal Terminal 4 and the positive battery terminal are in the same electrical state Terminal 1 and the positive terminal are not connected bulbs A and B are still in closed paths with the battery Terminal 1 and the positive terminal are separated by the gap Terminals 1 and 4 are connected Terminal 4 and the positive terminal are connected Terminals 1 and 2 are connected Terminal 2 and the positive terminal are not connected A battery uses a chemical reaction to maintain different electrical states at the terminals The bulb is not in the closed path containing the battery the terminals are separated by a gap Terminal 6 and the positive terminal are connected Terminal 1 and the positive terminal are separated by the gap The battery in 4 is not in a closed path Terminal 1 and the positive terminal are separated by the gap there is a path containing A and a different path containing B and C there is no path containing both switch Y and bulb A a damaged bulb creates a gap there is a short circuit A battery uses a chemical reaction to maintain different electrical states at the terminals Terminal 5 and the positive terminal are connected Terminal 1 and the positive terminal are separated by the gap Terminals 1 and 2 are in the same electrical state B and C are in the same path with the battery the path is not closed Terminal 1 and the positive terminal are not connected The battery in 2 is not in a closed path Terminal 5 and the positive terminal are connected there is a path containing A, C, Z and X Terminal 2 and the positive terminal are separated by the gap The battery in 2 is not in a closed path the terminals are not separated by a gap When the switch and the bulb are contained in the same path Bulb B and Bulb C were still contained in the same closed path with the battery. Circuit 4 has no closed paths Measuring voltage indicates the place where the electrical state changes due to a gap. A non-zero voltage means that the terminals are not connected. If C burns out, then A and B are still in a closed path with the battery. there is no gap between the terminals When the switch and the bulb are contained in the same path terminal 1 is connected to the negative battery terminal If a bulb and a switch are in the same path the switch affects the bulb The terminals are in the same state. The battery in 4 is not in a closed path Bulb A is still contained in a closed path with the battery and switch X. Bulb A is still contained in a closed path with the battery. there is a path containing both Z and C Bulb A is still contained in a closed path with the battery and switch X. Terminals 1, 2 and 3 are separated from the positive battery terminal by a gap Bulb A was still contained in the same closed path with the battery. The battery in 4 is not in a closed path A and C are in the same closed path Bulb C is in a separate path If bulb A burns out, neither B nor C is in a closed path Terminal 1 and the positive terminal are not connected The battery in 2 is not in a closed path there is no gap between the terminals there is a closed path containing both the bulb and a battery Terminals 1 and 6 are not connected Bulb A is still contained in a closed path with the battery and switch X. If a bulb and a switch are in the same path the switch affects the bulb If bulb A burns out, bulbs B and C are still in a closed path Terminals 1, 2 and 3 are separated from the positive battery terminal by a gap The battery in 2 is not in a closed path The damaged bulb and the other bulb must be contained in the same path Terminal 6 and the positive terminal are connected the path is not closed bulbs B and C are still in closed paths with the battery If a bulb and a switch are in the same path the switch affects the bulb A and C are in the same path Switch Y and bulb A are not in the same closed path A battery uses a chemical reaction to maintain different electrical states at the terminals Terminals 4, 5 and 6 are connected to the positive battery terminal Switch Y and bulb A are not in the same closed path If C burns out, then A and B are still in a closed path with the battery. Bulb C was no longer in a closed path with the battery The terminals are in the same state. Bulb B is in a separate path A non-zero voltage means that the terminals are not connected. The battery in 4 is not in a closed path Measuring voltage indicates the place where the electrical state changes due to a gap. If C burns out, then A and B are still in a closed path. A and C are not in the same path with the battery Terminals 1 and 2 are in the same electrical state Bulb A is still in a closed path with the battery A and C are in the same closed path there is a path containing both Z and C there is no gap between the terminals Bulbs A and C are still contained in closed paths with the battery When the switch and the bulb are contained in the same path there is no gap between the terminals there is a path containing A and a different path containing B and C If C burns out, then A and B are still in a closed path with the battery. Terminal 6 and the positive terminal are connected Circuit 4 has no closed paths Measuring voltage indicates the place where the electrical state changes due to a gap. Measuring voltage indicates the place where the electrical state changes due to a gap. there is no closed path containing the battery there is a gap in a circuit Terminal 1 and the positive terminal are separated by the gap If a bulb and a switch are in the same path the switch affects the bulb there is no gap between the terminals Terminal 1 and the positive terminal are separated by the gap there is a complete circuit Bulb B and Bulb C were still contained in the same closed path with the battery. Terminals 4, 5 and 6 are connected to the positive battery terminal the terminals are not connected terminal 1 is connected to the negative battery terminal Switch Y and bulb A are not in the same closed path terminal 6 is separated by a gap from the negative battery terminal there is no gap between the terminals terminal 4 is separated by a gap from the negative battery terminal Terminals 4, 5 and 6 are connected to the positive battery terminal terminal 1 is connected to the negative battery terminal If a bulb and a switch are in the same path the switch affects the bulb B and C are in the same path with the battery Terminal 6 and the positive terminal are connected If C burns out, then A and B are still in a closed path. Terminal 5 and the positive terminal are connected The bulb is not in the closed path containing the battery Terminal 1 and the positive terminal are separated by the gap If bulb A burns out, bulbs B and C are still in a closed path If bulb A burns out, B and C are no longer in a closed path with the battery there is a short circuit Circuit 4 has no closed paths Terminals 1, 2 and 3 are connected to the negative battery terminal A and C are not in the same path A and C are not in the same path When the switch and the bulb are contained in the same path there is an incomplete circuit Circuit 4 has no closed paths A battery uses a chemical reaction to maintain different electrical states at the terminals A battery uses a chemical reaction to maintain different electrical states at the terminals Terminals 1 and 4 are connected If C burns out, then A and B are still in a closed path. Bulb A is still in a closed path with the battery B and C are in the same path with the battery terminal 1 is connected to the negative battery terminal The battery in 2 is not in a closed path Bulb A was still contained in the same closed path with the battery. B and C are in the same path with the battery A battery uses a chemical reaction to maintain different electrical states at the terminals Terminal 3 and the positive terminal are separated by the gap A and C are in different paths with the battery Terminals 1, 2 and 3 are separated from the positive battery terminal by a gap Bulb C was not in a closed path the path is not closed Bulb A is still in a closed path with the battery Terminals 1 and 6 are not connected bulbs B and C are still in closed paths with the battery Terminals 1 and 6 are separated by the gap the battery is contained in a closed path in which there is no bulb there is a closed path containing both the bulb and a battery Bulb B is in a separate path Terminal 5 and the positive terminal are connected the terminals are not connected the battery is contained in a path in which there is no bulb the battery is in an open path there is an incomplete circuit The damaged bulb and the other bulb must be contained in the same path The battery in 2 is not in a closed path Bulb A was still contained in the same closed path with the battery. The terminals are in the same state. B and C are in the same path with the battery the battery is contained in a closed path in which there is no bulb Terminals 1 and 6 are separated by the gap there is a gap in a circuit Bulb A is still contained in a closed path with the battery and switch Z. Bulb A is still in a closed path with the battery Terminals 4, 5 and 6 are connected to the positive battery terminal Bulb C was not in a closed path Terminals 4, 5 and 6 are connected to the positive battery terminal Terminal 1 and the positive terminal are separated by the gap A, B and C are in different paths Terminals 1 and 6 are not connected the terminals are not connected Bulb A is still contained in a closed path with the battery and switch Z. If bulb A burns out, neither B nor C is in a closed path each bulb is in its own path If bulb A burns out, B and C are no longer in a closed path with the battery Terminals 1, 2 and 3 are separated from the positive battery terminal by a gap Terminal 4 and the positive terminal are not separated by the gap When the switch and the bulb are contained in the same path the path is not closed If bulb A burns out, neither B nor C is in a closed path each bulb is in its own path Bulb A was still contained in the same closed path with the battery. Terminals 1 and 4 are connected Bulb C is in a separate path there is a complete circuit If a bulb and a switch are in the same path the switch affects the bulb Terminal 1 and the positive terminal are separated by the gap Bulb B and Bulb C were still contained in the same closed path with the battery. there is a path containing A, C, Z and X When the switch and the bulb are contained in the same path There is no gap between terminal 6 and the positive terminal Bulbs A and C are still in closed paths with the battery Bulbs A and C are in a closed path Terminals 1, 2 and 3 are separated from the positive battery terminal by a gap the terminals are separated by a gap Terminals 4, 5 and 6 are connected to the positive battery terminal There is no path containing both switch Y and bulb A there is a path containing A, C, Z and the battery Terminals 4, 5 and 6 are connected to the positive battery terminal The battery in 2 is not in a closed path Terminal 1 and the positive terminal are separated by the gap A and C are in different paths with the battery Bulb A is still in a closed path with the battery Terminal 1 and the positive terminal are separated by the gap Bulbs A and C are still in closed paths Terminal 1 and the positive terminal are separated by the gap A battery uses a chemical reaction to maintain different electrical states at the terminals the bulb and the battery are in a closed path A and C are in different paths Terminal 1 and the positive terminal are separated by the gap The damaged bulb and the other bulb must be contained in the same path there is no path containing both switch Y and bulb A When the switch and the bulb are contained in the same path Terminals 4, 5 and 6 are connected to the positive battery terminal there is no gap between the terminals Terminals 4, 5 and 6 are not connected to the negative battery terminal If C burns out then A and B are still in a closed path with the battery A and C are in the same path A and C are in the same closed path If a bulb and a switch are in the same path the switch affects the bulb A and C are not in the same path with the battery Terminal 6 and the positive terminal are not separated by the gap Terminal 1 and the positive terminal are separated by the gap there is an incomplete circuit If C burns out then A and B are still in a closed path with the battery each bulb is in its own path the terminals are separated by a gap A and C are in the same closed path there is a short circuit Terminal 1 and the positive terminal are separated by the gap If C burns out then A and B are still in a closed path with the battery When the switch and the bulb are contained in the same path there is a path containing both Z and C The battery is contained in a path which does not contain any other components