TS EAMCET · Physics · Electromagnetic Induction
A circular coil of area \(3 \times 10^{-2} \mathrm{~m}^2, 900\) turns and a resistance of \(1.8 \Omega\) is placed with its plane perpendicular to a uniform magnetic field of \(3.5 \times 10^{-5} \mathrm{~T}\). The current induced in the coil when it is rotated through \(180^{\circ}\) in half a second is
- A 2.1 mA
- B 1.8 mA
- C 1.5 mA
- D 2.7 mA
Answer & Solution
Correct Answer
(A) 2.1 mA
Step-by-step Solution
Detailed explanation
\( I = \frac{2NBA}{R\Delta t} \) \( I = \frac{2 \times 900 \times 3.5 \times 10^{-5} \mathrm{~T} \times 3 \times 10^{-2} \mathrm{~m}^2}{1.8 \, \Omega \times 0.5 \mathrm{~s}} \) \( I = \frac{1.89 \times 10^{-3}}{0.9} \mathrm{~A} \)…
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