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BITSAT2021PhysicsElectromagnetic InductionActual

A metal disc of radius 100 ~cm is rotated at a constant angular speed of 60 rad / s in a plane at right angles to an external field of magnetic induction 0.05 ~Wb / m ² . The emf induced between the centre and a point on the rim will be

Options

  1. A3 ~V
  2. B1.5 ~V
  3. C6 ~V
  4. D9 ~V

Correct answer

B. 1.5 ~V

Step-by-step solution

Induced emf produced between the centre and a point on the disc is given by array l e= 1 2 BR ² =60 rad / s , B =0.05 ~Wb / m ² and R =100 ~cm =1 ~m We get e= 1 2 60 0.05 (1)²=1.5 ~V array

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