Q88 / 120 · VITEEE 2016 · Physics

A square current carrying loop is changed to a circular loop in time $\mathrm{t}_{1}$. Then

  • Correct answer
    A
    emf is induced in loop for time $t < t_{1}$
  • B
    emf is induced in loop for time $t>t_{1}$
  • C
    no emf is induced in loop during whole process
  • D
    emf is induced due to change in magnetic field

Solution

For the time $\mathrm{t} < \mathrm{t}_{1}$, area of loop changes. Hence, magnetic flux linked with it changes during this time and emf is induced thereby.

Hence, the correct answer is option: 'A'.

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