Current Electricity

Related Questions

• The current between B and D in the given figure is

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• Two resistances of 400 $\Omega$ and 800 $\Omega$ are connected in series with 6 volt battery of negligible internal resistance. A voltmeter of resistance 10,000 $\Omega$ is used to measure the potential difference across 400 $\Omega$. The error in the measurement of potential difference in volts approximately is

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• A copper wire of length 1 m and radius 1 mm is joined in series with an iron wire of length 2 m and radius 3 mm and a current is passed through the wires. The ratio of the current density in the copper and iron wires is

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• A voltmeter has a resistance of Gohms and range Vvolts. The value of resistance used in series to convert it into a voltmeter of range nV volts is

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• In the following Wheatstone bridge $P/Q = R/S$. If key K is closed, then the galvanometer will show deflection

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