Current Electricity

Related Questions

• AB is a wire of uniform resistance. The galvanometer G shows no current when the length AC = 20cm and CB = 80 cm. The resistance R is equal to

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• In the adjoining circuit, the battery ${E_1}$ has an $e.m.f.$ of $12\,volt$ and zero internal resistance while the battery $E$ has an $e.m.f.$of$2\,volt$. If the galvanometer $G$ reads zero, then the value of the resistance $X$ in ohm is

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• A battery of 6 volts is connected to the terminals of a three metre long wire of uniform thickness and resistance of the order of 100$\Omega $. The difference of potential between two points separated by 50$cm$ on the wire will be

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• Two wires of the same material and equal length are joined in parallel combination. If one of them has half the thickness of the other and the thinner wire has a resistance of 8 ohms, the resistance of the combination is equal to

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• $A\,\,{5^o}C$ rise in the temperature is observed in a conductor by passing some current. When the current is doubled, then rise in temperature will be equal to

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