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NEET 2023
Exam
NEET
Year
2023
Subject
Physics
Chapter
Electromagnetic Induction

NEET 2023 · Physics · Electromagnetic Induction

An emf is generated by an ac generator having 100 turn coil, of...

An emf is generated by an ac generator having 100 turn coil, of loop area 1 m21 \mathrm{~m}^2. The coil rotates at a speed of one revolution per second and placed in a uniform magnetic field of 0.05 T0.05 \mathrm{~T} perpendicular to the axis of rotation of the coil. The maximum value of emf is

Options

  1. A62.8 V62.8 \mathrm{~V}
  2. B6.28 V6.28 \mathrm{~V}
  3. C3.14 V3.14 \mathrm{~V}
  4. D31.4 V31.4 \mathrm{~V}

Correct answer

D. 31.4 V31.4 \mathrm{~V}

Step-by-step solution

Maximum value of emf generated by an ac generator is given by ε0=NBAω=100×0.05×1×2π=31.415 V≈31.4 V\begin{aligned} \varepsilon_0 & =\mathrm{NBA} \omega \\ & =100 \times 0.05 \times 1 \times 2 \pi \\ & =31.415 \mathrm{~V} \\ & \approx 31.4 \mathrm{~V}\end{aligned}
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