Current Electricity

Related Questions

• Resistances ${R_1}$ and ${R_2}$ are joined in parallel and a current is passed so that the amount of heat liberated is ${H_1}$ and ${H_2}$ respectively. The ratio $\frac{{{H_1}}}{{{H_2}}}$ has the value

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• Two resistances are connected in two gaps of a metre bridge. The balance point is 20 cm from the zero end. A resistance of 15 ohms is connected in series with the smaller of the two. The null point shifts to 40 cm. The value of the smaller resistance in ohms is

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• An electric bulb of 100 watt is connected to a supply of electricity of 220 V. Resistance of the filament is

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• In the circuit shown in the figure, the current flowing in $2\,\Omega $ resistance

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• A 10 m long wire of 20$\Omega$ resistance is connected with a battery of 3 volte.m.f. (negligible internal resistance) and a 10 $\Omega$ resistance is joined to it is series. Potential gradient along wire in volt per meter is

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