TS EAMCET · Physics · Electromagnetic Induction
A circular coil of area \(100 \mathrm{~cm}^2\) and 20 turns is kept in magnetic field of flux density \(2 \mathrm{~Wb}-\mathrm{m}^2\). It rotates from a position where its plane makes an angle of \(30^{\circ}\) with the field to a position perpendicular to the field in a time \(0.2 \mathrm{~s}\). Find the magnitude of the emf induced in the coil due to its rotation.
- A 2 V
- B 3 V
- C 1.5 V
- D 1 V
Answer & Solution
Correct Answer
(D) 1 V
Step-by-step Solution
Detailed explanation
Given that, area of coil, \(A=100 \mathrm{~cm}^2\) \(=100 \times 10^{-4} \mathrm{~m}^2\) Number of turns, \(N=20\) Magnetic field, \(B=2 \mathrm{~Wb}-\mathrm{m}^2\) Now, induced emf, \(e=-\frac{\Delta \phi}{\Delta t}=\frac{-\left(\phi_2-\phi_1\right)}{t}\)…
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