Electromagnetism - SS2 Physics Past Questions and Answers - page 2

Two point charges, q1 = +2 μC and q2 = -4 μC, are placed 10 cm apart. What is the electric field at a point located 5 cm from q1 and 5 cm from q2? (Assume vacuum permittivity is ε0 = 8.85 x 10-12 C2/N m2)

A parallel plate capacitor with a plate area of 100 cm2 and plate separation of 2 mm is connected to a 12 V battery. What is the electric field between the plates? (Assume vacuum permittivity is ε0 = 8.85 x 10-12 C2/N m2)

A point charge of +5 μC is located at the origin. What is the electric potential at a point 2 metres away from the charge? (Assume vacuum permittivity is ε0 = 8.85 x 10-12 C2/N m2)

The capacitance of a parallel plate capacitor depends on:

A capacitor stores energy in the form of:

The capacitance of a capacitor is directly proportional to:

The time constant of an RC circuit depends on:

When a dielectric material is inserted between the plates of a capacitor, the capacitance:

The energy stored in a capacitor is given by the formula:

When two capacitors are connected in series, the total capacitance is: