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Physics · PYQ NEET UG 2016(2)
हिन्दीA filament bulb (\( 500\text{W}, 100\text{V} \)) is to be used in a \( 230\text{ V} \) main supply. When a resistance is connected in series, it works perfectly and the bulb consumes \( 500\text{ W} \). The value of R is
Correct answer · Option 4
\( 26\ \Omega \)
Explanation
Current \( I = \frac{P}{V} = \frac{500}{100} = 5\text{ A} \). Voltage drop across \( R \) is \( 230 - 100 = 130\text{ V} \). Therefore, \( R = \frac{130}{5} = 26\ \Omega \).
