Current Electricity

Related Questions

• In a hydrogen discharge tube it is observed that through a given cross-section $3.13 \times 10^{15}$ electrons are moving from right to left and $3.12 \times 10^{15}$ protons are moving from left to right. What is the electric current in the discharge tube and what is its direction

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• Two resistance wires on joining in parallel the resultant resistance is $\frac{6}{5}\,\,ohms$. One of the wire breaks, the effective resistance is 2 ohms. The resistance of the broken wire is

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• Kirchhoff's second law is based on the law of conservation of

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• A potentiometer wire of length $1\,m$ and resistance 10 $\Omega$ is connected in series with a cell of emf 2V with internal resistance 1 $\Omega$ and a resistance box including a resistance R. If potential difference between the ends of the wire is 1 mV, the value of R is

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• A 100 V voltmeter of internal resistance $20\,k\Omega $ in series with a high resistance R is connected to a 110 V line. The voltmeter reads 5 V, the value of R is

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