JEE Main 2026 · Session 2 · Shift 1 · Physics
Question 38
When a coil is placed in a time dependent magnetic field the power dissipated in it is P. The number of turns, area of the coil and radius of the coil wire are N, A and r respectively. For a second coil number of turns, area of the coil and radius of the coil wire are 2N, 2A and 3r respectively. When the first coil is replaced with second coil the power dissipated in it is sqrt(2)·αP. The value of α is ____.
- A. 36Correct answer
- B. 128sqrt(2)
- C. 16
- D. 64
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Official source
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Question paper, page 15-16.