Three bulbs and two bulbs Three identical low-resistance (round) bulbs are in se

Question

Three bulbs and two bulbs Three identical low-resistance (round) bulbs are in series as shown in the diagram of Circuit 1. Thick copper wires connect the bulbs. In the steady state, 2 x 1017 electrons leave the battery at location A every second. B C DE G F (a) How many electrons enter the second bulb at location D every second? 2e17 electrons/s (b) Next the middle bulb (at DE) is replaced by a wire, as shown in the diagram of Circuit 2. B C DE G F Which of the following statements are true? O The current in circuit 2 is the same as the current in circuit 1. The electric field in the connecting wires is negligible. The electric field in each bulb in circuit 2 is the same as it was in each bulb in circuit 1. The batteries in circuits 1 and 2 are the same. The round trip potential difference is the same in circuits 1 and 2. O In circuit 2 the electric field in each bulb is larger than it was in circuit 1.

Explanation / Answer

the answers are

b) the electric field in the connecting wire is negligible

d) the batteries in the circuit 1 and 2 are the same

e) the round trip potential difference is same in the circuit 1 and 2

f) in circuit2 electric field in each ball is larger than in circuit 1

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