Current Electricity

Related Questions

• Masses of three wires of copper are in the ratio of $1 : 3 : 5$ and their lengths are in the ratio of 5:3:1. The ratio of their electrical resistances are

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• Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is

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• $50\,\Omega $ and $100\,\Omega $ resistors are connected in series. This connection is connected with a battery of 2.4 volts. When a voltmeter of $100\,\Omega $ resistance is connected across $100\,\Omega $ resistor, then the reading of the voltmeter will be

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• The maximum power drawn out of the cell from a source is given by (where r is internal resistance)

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• 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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