Physics · Electromagnetic Induction
A horizontal telegraph wire of length 30 m extending east to west falls down freely from a height of 20 m. If the resistance of the wire is 40 Ω and the horizontal component of the Earth's magnetic field at that place is 2 × 10-5 T, then the induced current when the wire reaches the ground is: (Acceleration due to gravity = 10 m/s2)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 10.03 A
- 23 A
- 33 mA
- 40.3 mA✓
Correct answer
0.3 mA
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