Suppose you are in a location where the magnetic field of Earth points north and

Question

Suppose you are in a location where the magnetic field of Earth points north and is horizontal to the ground. A circular wire is rotated as shown in the figure (the axis of rotation is along the north-south direction).

A) Will there be an induced current in the wire?

1. Yes; the amount of magnetic field penetrating the loop changes as it rotates.

2. No; the amount of magnetic field penetrating the loop does not change as it rotates

3. Unable to determine

4. yes; current direction reverses every cycle

5. yes; current direction doesn't change.

B) What if the axis of rotation were in the east-west direction?

1. Yes; the amount of magnetic field penetrating the loop changes as it rotates.

2. No; the amount of magnetic field penetrating the loop does not change as it rotates

3. Unable to determine

4. yes; current direction reverses every cycle

5. yes; current direction doesn't change.

Explanation / Answer

A) 2. No; the amount of magnetic field penetrating the loop does not change as it rotates

B)

1. Yes; the amount of magnetic field penetrating the loop changes as it rotates.

5. yes; current direction doesn't change.

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