AP EAMCET · PHYSICS · Electromagnetic Induction
A coil having 100 square loops each of side 10 cm is placed such that its plane is normal to a magnetic field, which is changing at a rate of \(0.7 \mathrm{~T} \mathrm{~s}^{-1}\). The emf induced in the coil is
- A 0.2 V
- B 0.4 V
- C 0.7 V
- D 1 V
Answer & Solution
Correct Answer
(C) 0.7 V
Step-by-step Solution
Detailed explanation
\(A = (0.1 \mathrm{~m})^2 = 0.01 \mathrm{~m}^2\) \(\mathcal{E} = N A \frac{dB}{dt} = 100 \cdot 0.01 \mathrm{~m}^2 \cdot 0.7 \mathrm{~T} \mathrm{~s}^{-1} = 0.7 \mathrm{~V}\)
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