Current Electricity

Related Questions

• The potential difference across the 100$\Omega$ resistance in the following circuit is measured by a voltmeter of 900 $\Omega$ resistance. The percentage error made in reading the potential difference is

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• At what temperature will the resistance of a copper wire become three times its value at $0^oC$ (Temperature coefficient of resistance for copper = $4 \times 10^{–3}$ per $^oC$)

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• A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is

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• A 25 watt, 220 volt bulb and a 100 watt, 220 volt bulb are connected in parallel across a 220 volt line. Which bulb will glow more brightly

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• In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across 60 cm of the potentiometer wire. If the cell is shunted by a resistance of $6\,\Omega $, the balance is obtained across 50 cm of the wire. The internal resistance of the cell is

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