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KCET2020PhysicsElectromagnetic Induction

A rod of length 2 ~m slides with a speed of 5 ~ms ⁻¹ on a rectangular conducting frame as shown in figure. There exists a uniform magnetic filed of 0.04 ~T perpendicular to the plane of the figure. If the resistance of the rod is 3 . The current through the rod is

Options

  1. A75 ~mA
  2. B133 ~mA
  3. C0.75 ~A
  4. D1.33 ~A

Correct answer

B. 133 ~mA

Step-by-step solution

Given, l=2 ~m , v=5 ~m / s , B=0.04 ~T and R=3 The current induced in a conducting coil, when moved in a uniform magnetic field is I= B l v R = 0.04 2 5 3 =0.133 ~A =133 ~mA

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