♡NUMERICALS♡.



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1. How much work will be done in bringing a charge of 5.0 milicoulombs from infinity to a point P at which the potential is 12V ?..........

2. A particle with a charge of 1.5 coulombs is taken from a point A at a potential of 50V to another point B at a potential of 120V. Calculate the work done.
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3. How many electrons are required to get 1C of negative charge ?
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4. Calculate the current in a wire if 900C of charge passes through it in 10 minutes.
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5. How much current will flow through a resistor of resistance 12W if a battery of 18V is connected across it?
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6. Calculate the resistance of a copper wire of length 1m and area of cross section 2 mm2. Resistivity of copper is 1.7 × 10 -8 W m.
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7. A copper wire has a resistance of 0.5 W. Another copper wire of the same mass as the first one is double in length of the first. Find the resistance of the second wire.
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8. In an experiment to verify Ohm' law, the current through a resistor and the potential difference across it are measured. From the values given below, plot a graph of i versus V. Show that the data confirms Ohm's law, and find the resistance of the resistor.

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