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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectromagnetic Induction

A conducting loop of area 5.0 cm ^2 is placed in a magnetic field which varies sinusoidally with time as B = B₀ t where B₀ = 0.20 T and = 300 s ⁻¹ . The normal to the coil makes an angle of 60^ with the field. Determine the emf induced at t = ( 600 ) s .

Options

  1. A7.5 10⁻³ V
  2. B1.5 10⁻² V
  3. C3.0 10⁻² V
  4. Dzero

Correct answer

D. zero

Step-by-step solution

The magnetic flux through the loop is given by = B A Substituting B = B₀ t , we get: = B₀ A t According to Faraday's law, the induced emf is: e = - d dt = -B₀ A t Substituting = 300 s ⁻¹ and t = 600 s : t = 300 600 = 2 Since ( 2 ) = 0 , the induced emf at this instant is zero, regardless of the values of A , B₀ , and .

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