Mathematics · DC Circuits
एक प्रेरक कुंडली (inductive coil) का समय नियतांक (time constant) 2.5 × 10-3 सेकंड है। जब श्रेणीक्रम में 80 Ω का प्रतिरोध जोड़ा जाता है, तो समय नियतांक घटकर 0.5 × 10-3 सेकंड हो जाता है। कुंडली का प्रतिरोध ज्ञात कीजिए।
- 140 Ω
- 250 Ω
- 320 Ω✓
- 4200 Ω
सही उत्तर देखें
20 Ω
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