Current Electricity

Related Questions

• A galvanometer of $100\,\Omega $ resistance gives full scale deflection when 10 mA of current is passed. To convert it into 10 A range ammeter, the resistance of the shunt required will be

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• A potentiometer consists of a wire of length 4 m and resistance $10\,\Omega $. It is connected to a cell of e.m.f. 2 V. The potential difference per unit length of the wire will be

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• In hydrogen atom, the electron makes $6.6 \times {10^{15}}$ revolutions per second around the nucleus in an orbit of radius $0.5 \times {10^{ - 10}}m$. It is equivalent to a current nearly

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• A cell of e.m.f.$E$ is connected with an external resistance $R$, then p.d. across cell is $V$ The internal resistance of cell will be

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• When the resistance of $9 \Omega$ is connected at the ends of a battery, its potential difference decreases from 40 volt to 30 volt. The internal resistance of the battery is

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