एक विद्युत बल्ब 200 V जनित्र से संबद्ध है। धारा 0.5 A है। बल्ब की सामर्थ्य क्या है?

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ALP CBT 2 Physics and Maths Previous Paper 4 (Held On: 22 Jan 2019 Shift 1)
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  1. 10 W
  2. 1000 W
  3. 1 W
  4. 100 W

Answer (Detailed Solution Below)

Option 4 : 100 W
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अवधारणा :

  • विद्युत शक्ति : वह दर जिस पर विद्युत ऊर्जा ऊर्जा के अन्य रूपों में अपव्ययित होती है, विद्युत शक्ति कहलाती है अर्थात

\(P = \frac{W}{t} = VI = {I^2}R = \frac{{{V^2}}}{R}\)

जहां V = विभव अंतर, R = प्रतिरोध और I = धारा।

गणना:

दिए गए - विभव अंतर (V) = 200 V और धारा (I) = 0.5 A

  • विद्युत शक्ति को निम्न रूप में लिखा जा सकता है,

⇒ P = VI

⇒ P = 200 × 0.5 = 100 W

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