Question

200V / 100W बल्ब को यदि 100 वोल्ट पर प्रयोग किया जाए तो बल्ब की शक्ति कितनी होगी

Answer 1

power of the bulb is 25 W

first find resistance of bulb,

given V = 200 volts , P = 100 watt

using formula, R = V²/P

= (200)²/100

= 40000/100

= 400 Ω

now, this bulb is connecting in a circuit of potential difference 100 volts.

so, power of the bulb, P' = V'²/R

= (100)²/400

= 10000/400

= 25 watt

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Answer 2

$\huge\bold\purple{Answer:-}$

first find resistance of bulb,

given V = 200 volts , P = 100 watt

using formula, R = V²/P

= (200)²/100

= 40000/100

= 400 Ω

now, this bulb is connecting in a circuit of potential difference 100 volts.

so, power of the bulb, P' = V'²/R

= (100)²/400

= 10000/400

= 25 watt