यदि शक्ति = 100 वाट और प्रतिरोध = 4 ओम, तो धारा (I) = ___________?

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RRB ALP Instrument Mechanic 23 Jan 2019 Official Paper (Shift 1)
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  1. 10 A
  2. 100 A
  3. 2 A
  4. 5 A

Answer (Detailed Solution Below)

Option 4 : 5 A
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Detailed Solution

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अवधारणा:

एक प्रतिरोधक में विलुप्त होने वाली शक्ति निम्न द्वारा दी जाती है

P = I2 R

जहाँ,

P = वाट में शक्ति अपव्यय

I = एम्पीयर में धारा

R = Ω में प्रतिरोध

गणना:

दिया गया है I = 1.414 A = √2 A

R = 50 Ω

शक्ति (P) निम्न होगी:

\(P=I^2R=(I)^2\times 50\)

⇒ I = 5 A

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