Three loops of wire move near a long straight wire carrying a current as in the

Question

Three loops of wire move near a long straight wire carrying a current as in the following figure. (a) What is the direction of the induced current, if any, in loop A ? Clockwise Counterclockwise No current is induced, (b) What is the direction of the induced current, if any, in loop B? Clockwise Counterclockwise No current is induced. A bar magnet is positioned near a coil of wire, as shown in the figure below. What is the direction of the current in the resistor when the magnet is moved to the left? a. No current is induced. b. The current is left to right. c. The current is right to left.

Explanation / Answer

3) (a) No current is induced

Explanation:

since the loop moves parallel to the wire there is no change in magnetic field because field depends on the distance from the wire which does not change.

(b) Counterclockwise

Explanation

here loop is moving away from the wire so the field decreases.Since the loop moves away from the wire the current inside the loop is closer to the wire is in same direction as that of the wire

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