Two coils are suspended around a central axis as shown in the figure below. One

Question

Two coils are suspended around a central axis as shown in the figure below. One coil is connected to a resistor with ends labeled a and b. The other coil is connected to a battery E. The coils are moving relative to each other as indicated by the velocity vectors v.

A. What is the direction of the magnetic fieldin the coil with the battery attached?

1. The primary field is zero.

2. left to right (Bprimary =>)

B. What is the direction of the induced magneticfield in the coil with the resistor attachedwhen the the coils are moving towards eachother?

1. right to left ((= Binduced)

2. left to right (Binduced =))

3. The induced field is zero.

C. What is the direction of the induced current inresistor R when the coils are moving towardseach other?

1. from b through R to a ( ? I)

2. from a through R to b (I ?!)

3. The induced current is zero.

Explanation / Answer

A) 2 b) 1 C) 3

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