Current Electricity

Related Questions

• In the circuit shown in figure, the current drawn from the battery is 4A. If $10 \Omega$ resistor is replaced by $20 \Omega$ resistor, then current drawn from the circuit will be

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• Four wires of equal length and of resistances 10 ohms each are connected in the form of a square. The equivalent resistance between two opposite corners of the square is

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• The length of a wire of a potentiometer is 100 cm, and the emf of its standard cell is E volt. It is employed to measure the e.m.f of a battery whose internal resistance is 0.5 $\Omega$. If the balance point is obtained at l = 30 cm from the positive end, the e.m.f. of the battery is

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• If the length of potentiometer wire is increased, then the length of the previously obtained balance point will

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• $20\mu A$ current flows for 30 seconds in a wire, transfer of charge will be

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