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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectromagnetic Induction

Consider the situation shown in the figure. If the closed loop is completely enclosed in the circuit containing the switch, and the switch is closed and after some time it is opened again, the closed loop will show

Options

  1. Aan anticlockwise current-pulse
  2. Ba clockwise current-pulse
  3. Can anticlockwise current-pulse and then a clockwise current-pulse
  4. Da clockwise current-pulse and then an anticlockwise current-pulse

Correct answer

D. a clockwise current-pulse and then an anticlockwise current-pulse

Step-by-step solution

When the switch is closed, current flows from the positive terminal (longer line on the left) to the negative terminal (shorter line on the right) of the battery. This establishes a clockwise current in the rectangular circuit. Using the right-hand thumb rule, the magnetic field B produced by the downward current in the rightmost wire of the rectangular circuit is directed outwards (out of the plane of the paper) at the location of the small circular loop. When the switch is just closed, the outward magnetic flux t

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