Mathematics · DC Circuits
The time constant of an inductive coil is 2.5 × 10-3 seconds. When an 80 Ω resistance is added in series, the time constant reduces to 0.5 × 10-3 seconds. Find the resistance of the coil.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 140 Ω
- 250 Ω
- 320 Ω✓
- 4200 Ω
Correct answer
20 Ω
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