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KCET2019PhysicsElectromagnetic Induction

Consider the situation given in figure. The wire ( A B ) is slid on the fixed rails with a constant velocity. If the wire ( A B ) is replaced by a semicircular wire, the magnitude of the induced current will

Options

  1. Adecrease
  2. Bincrease
  3. Cincrease or decrease depending on whether the semicircle bulges towards the resistance or away from it
  4. Dremain same

Correct answer

D. remain same

Step-by-step solution

(D) The induced emf e ( =l( v B )=I(v B )=B v ) Induced current, ( i = e R ) If the straight wire is replaced by a semicircular wire, resistance ( R ) remains unchanged. Hence, current remains same.

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