Just as electricity is supplied at 220 V for domestic use in India, it is supplied at 110 V in USA. If resistance of 60 W bulb for use in India is R, then that of a 60 W bulb for use in USA will be

भारत में घरेलू उपयोग के लिए जिस प्रकार विद्युत 220 V पर आपूर्त की जाती है, उसी प्रकार USA में विद्युत 110 V पर आपूर्त की जाती है। यदि भारत में उपयोग के लिए 60 W के बल्ब का प्रतिरोध R है, तब USA में उपयोग के लिए 60 W के बल्ब का प्रतिरोध होगा

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\frac{R}{2}

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\frac{R}{4}

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The correct option is D $\frac{R}{4}$
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Just as electricity is supplied at 220V in India, it is supplied 110 V in USA. If the resistance of 60W bulb for use in India is R, that of a 60W bulb for use in USA will be

Assertion : For drying $H_{2} S$ , Conc. $H_{2} S O_{4}$ cannot be used.

Reason: Moist $H_{2} S$ is oxidized by Conc. $H_{2} S O_{4}$

60

% of

H_{2}

and

40

% of

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by volume are present in a mixture at a pressure of

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m m

. Pressure exerted by

H_{2}

is:

Q. For,

Z n (s) + 2 H C l (a q) ⇌ Z n C l_{2} (a q) + H_{2} (g)

what will be the expression of

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The correct option is D R4Solution

The correct option is D $\frac{R}{4}$
Solution