Current Electricity

Related Questions

• $\sigma_1$ and $\sigma_2$ are the electrical conductivities of Ge and Na respectively. If these substances are heated, then

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• A current of 2.0 ampere passes through a cell of e.m.f. 1.5 volts having internal resistance of 0.15 ohm. The potential difference measured, in volts, across both the ends of the cell will be

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• Two electric bulbs whose resistances are in the ratio of 1 : 2 are connected in series. The powers dissipated in them have the ratio

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• What is the reading of voltmeter in the following figure

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• If two electric bulbs have 40W and 60W rating at $220V$, then the ratio of their resistances will be

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