Electricity and Magnetism - SS2 Physics Past Questions and Answers - page 1

Which of the following statements correctly describes an electric field?

The electric field lines around a positive point charge:

The electric potential at a point in an electric field is:

The electric potential inside a conductor in electrostatic equilibrium is:

Two point charges, +Q and -Q, are placed at a distance d from each other. The electric potential at the midpoint between the charges is:

Two point charges, +3 μC and -5 μC, are placed 10 cm apart. What is the magnitude of the electric field at a point that is 5 cm from the positive charge? 

A parallel plate capacitor has a capacitance of 12 μF. If a potential difference of 24 V is applied across the plates, what is the charge stored on the capacitor?

A positive charge of +6 μC is placed in an electric field where the electric potential is 120 V. What is the change in electric potential energy if the charge is moved 4 cm in the direction opposite to the electric field? 

A point charge of +2 nC is placed at the origin. What is the electric potential at a point located 4 m away from the charge?

The capacitance of a capacitor depends on: