Electrostatics questions | form five Physics

What is meant by dielectric constant?

State Coulomb`s law of force between two electrically charged bodies.

Can there be a potential difference between two adjacent conductors carrying the same positive charge? Give a reason.

A parallel plate capacitor with air as a dielectric has plates of area 4.0x10^-2m² which are 2.0mm apart. The capacitor is charged to 100V battery and connected in parallel with a similar uncharged capacitors with plates of half the area and twice the distance apart. If the edge effect is negelected, calculate the final charge on each plate.

Derive an expression for the total capacitance of two capacitors C₁ and C₂ connected in series.

Two capacitor of 15µF and 20µF are connected in series with a 600V supply. Calculate the charge and potential difference across each capacitor.

Briefly explain the effect of the dielectric material on the capacitance of a capacitor when the capacitor is:

1. Isolated
2. Connected to the battery

How are electrolytic capacitors made?

Two point charges of equal mass m and charge Q are suspended at a common point by two threads of negligible mass and length L. If the point charges are at equilibrium, show that;

1. The distance of separation
2. the angle of inclination

Two point charges, q_a=+3µC and q_b=-3µC, are located o.2m apart in vacuum. Find;

1. The electric field at the midpoint of the line joining two charges.
2. The force experienced by the negative test charge of magnitude 1.5x10^-9C placed at this point.