COMEDK · Physics · 22. Electromagnetic Induction
A metallic rod of \(10 \mathrm{~cm}\) is rotated with a frequency 100 revolution per second about an axis perpendicular to its length and passing through its one end in uniform transverse magnetic field of strength \(1 \mathrm{~T}\). The emf developed across its ends is:
- A 6.28 V
- B 628 V
- C 31.4 V
- D 3.14 V
Answer & Solution
Correct Answer
(D) 3.14 V
Step-by-step Solution
Detailed explanation
The induced electromotive force (emf) across the ends of a conducting rod of length \(l\) rotating with angular velocity \(\omega\) in a uniform magnetic field \(B\) perpendicular to the plane of rotation is given by the formula: \(\varepsilon = \dfrac{1}{2} B \omega l^2\) Given…
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