Electrostatics questions | form five Physics

Define the terms capacitance and electric potential.

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The capacitance C of a capacitor is fully charged by a 200V battery. It is then discharded through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity 2.5x10²Jkg^-1K^-1 and of mass of 0.1kg. If the temperature of the block rises by 0.4K, what is the value of C?.

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A parallel plate capacitor has plates each of area 0.24m² separated by a small distance 0.50mm. If the capacitor is fully charged by a battery of electromotive force of 24V. Calcultate;

1. The capacitance of the capacitor
2. The energy stored in the capacitor.

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Comment on the assertion that, the safest way of protecting yourself from lightning is to be inside a car.

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Find the total potential energy of the system of point charges shown in Figure 1.

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UNSOLVED