Current Electricity

Related Questions

• In a Wheatstone’s bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is

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• An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is

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• The resistivity of alloys $ = {R_{{\rm{alloy}}}}$; the resistivity of constituent metals $R_{\mathrm{metal}}$. Then, usually

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• A thick wire is stretched so that its length become two times. Assuming that there is no change in its density, then what is the ratio of change in resistance of wire to the initial resistance of wire

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• Two resistances are joined in parallel whose resultant is $\frac{6}{8}$ohm. One of the resistance wire is broken and the effective resistance becomes $2\,\Omega $. Then the resistance in ohm of the wire that got broken was

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