Two coils, 1 and 2 , with iron cores are positioned as shown in the figure. Coil

Question

Two coils, 1 and 2, with iron cores are positioned as shown in the figure. Coil 1 is part of a circuit with a battery and a switch.

Assume S has been closed for a long time. Which one of the following statements is true when coil 1 and its core are moved toward point B?

1) There is an induced current in R that flows from right to left. 2) There is an induced magnetic field in coil 2 that points toward B. 3) There is a magnetic field in coil 1 that points toward B. 4) There is an induced current in R that flows from left to right. 5) There is no induced current in r. Coil 2 Coil 1 Reference: Ref 22-5

Explanation / Answer

Correct answer is option (a) : there is an induced current in T that flows from right to left

When coil 1 is moved towards point B, an induced current sets up in coil 2 which flows through R to the left.

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