COMEDK · Physics · 22. Electromagnetic Induction
A rectangular coil of 300 turns has an average area of \(25 \mathrm{~cm} \times 10 \mathrm{~cm}\). The coil rotates with a speed of 50 cps in a uniform magnetic field of strength \(4 \times 10^{-2} \mathrm{~T}\) about an axis perpendicular to the fiel(d)The peak value of the induced emf (in volt) is
- A \(3 \pi\)
- B \(30 \pi\)
- C \(300 \pi\)
- D \(3000 \pi\)
Answer & Solution
Correct Answer
(A) \(3 \pi\)
Step-by-step Solution
Detailed explanation
Given, area of rectangular coil, \(A=25 \mathrm{~cm} \times 10 \mathrm{~cm}\) \[ \Rightarrow \quad A=250 \mathrm{~cm}^{2}=0.025 \mathrm{~m}^{2} \] No. of turns in the coil, \(N=300\) Magnetic field strength, \(B=4 \times 10^{-2} \mathrm{~T}\) Peak voltage will be induced when…
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