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In the circuit shown in figure, the resistance of each resistor is R. The equivalent resistance between points X and Y is
You are given several identical resistances each of value R = 10 and each capable of carrying a maximum current of 1A. It is required to make a suitable combination of these resistances to produce a resistance of 5 which can carry a current of 4A. The minimum number of resistances required is
The voltmeter shown in figure reads 2V. What resistance should be connected in parallel with the 2 resistor so that that the voltmeter reads 3V?
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