Question

Two different loops are concentric & lie in the same plane. The current in outer loop is clockwise & increasing with time. The induced current in the inner loop then, is..........

• A. clockwise
• B. zero
• C. counter-clockwise
• D. direction depends on the ratio of loop radii

Answer 1

The correct option is C

counter-clockwise

Explanation for correct answer:

• Option C: counter clockwise

1. Lenz Law states that the induced current will flow in a direction that opposes the change that caused it to be formed.
2. Since the current in the outer loop flows in a clockwise direction and increasing in magnitude, the current induced in the inner loop will flow in a counterclockwise direction to oppose this.
3. Hence, option C is correct.

Explanation for incorrect answer(s):

• Option A: clockwise

1. Since Lenz Law states that the induced current will flow in a direction that opposes the change that caused it to be formed then it can not be clockwise.
2. Hence, option A is not correct.

• Option B: zero

1. Since Lenz Law states that the induced current will flow in a direction that opposes the change that caused it to be formed. then it can not be zero.
2. Hence, option B is incorrect.

• Option D: direction depends on the ratio of loop radii

1. Magnitude of induced current depends on the radii of the loop and not direction of current.
2. Hence, option D is incorrect.

Thus, option C is the correct answer.