Current Electricity

Related Questions

• Two heater wires of equal length are first connected in series and then in parallel. The ratio of heat produced in the two cases is

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• If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is a

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• If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a

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• The resistance of a coil is $4.2 \Omega$ at $100^oC$ and the temperature coefficient of resistance of its material is $0.004/^o C$. Its resistance at $0^oC$ is

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• Four resistances $10 \Omega$, $5 \Omega$, $7 \Omega$ and $3 \Omega$ are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively. Another resistance of $10 \Omega$ is connected across the diagonal AC. The equivalent resistance between A and B is

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