Current Electricity

Related Questions

• In the diagram shown, the reading of voltmeter is 20 V and that of ammeter is 4 A. The value of R should be (Consider given ammeter and voltmeter are not ideal)

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• A potentiometer is used for the comparison of e.m.f. of two cells ${E_1}$ and ${E_2}$. For cell ${E_1}$ the no deflection point is obtained at 20$cm$ and for ${E_2}$ the no deflection point is obtained at 30$cm$. The ratio of their e.m.f.'s will be

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• In the circuit shown, the point ‘B’ is earthed. The potential at the point ‘A’ is

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• Thirteen resistances each of resistance Rohm are connected in the circuit as shown in the figure below. The effective resistance between A and B is

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• There are 8 equal resistances R. Two are connected in parallel, such four groups are connected in series, the total resistance of the system will be

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