Electrostatics questions | form five Physics

Define the terms capacitance and electric potential.

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?.

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.

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

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

State coulomb`s law of electrostatics.

Define electric field strength, E at any point.

Mention two common properties of electric field lines.

Two identical balls each of mass 0.8kg carry identical charge and they are separated by thread of equal length. At equilibrium they positioned themselves at a distance of 1.2cm as shown in Figure 2. Calculate the charge in either ball.

Two capacitors C₁ and C₂ each of area 36cm² separated by 4cm have capacitances of 6µC and 8µC respectively. The capacitor C₁ is charged to a potential difference of 110V where as the capacitor C₂ is charged to a potential difference of 140V. The capacitors are now joined with plates of like charges connected together.

1. What will be the loss of energy transferred to heat in the connecting wires?
2. What will be the loss of energy per unit volume transferred to heat in the connecting wires?