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AP EAMCET202120 Aug 2021Evening ShiftPhysicsElectromagnetic InductionActual

An AC generator consists of a coil of 100 turns and is of cross-sectional area 3 m 2 . It is rotating at a constant angular speed of 60 rad s - 1 in a uniform magnetic field of 0 . 04 T . Resistance of the coil is 360 Ω . What is the maximum power dissipation in the coil?

Options

  1. A720   W
  2. B518   W
  3. C360   W
  4. D100   W

Correct answer

A. 720   W

Step-by-step solution

Max emf, ε 0 = N B A ω = 100 × 0 . 04 × 3 × 60 = 720   V Power dissipated, P = ε 0 2 2 R = 720 2 2 × 360 = 720   W

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