Electric Field - Physics A Level

Before a thunderstorm, the hairs on your head sometimes stand on end.

A hair with weight of 4.9 x 10^-3 N and charge 1.0 x 10^-12 C is supported by a force due to an electric field.

What is the electric field strength?

Which diagram represents the electric field of a negative point charge, -q ?

A positive charge and a negative charge of equal magnitude are placed a short distance apart. Which diagram best represents the electric field?

Which diagram shows the electric field between a positively charged metal sphere and an earthed metal plate?

In a uniform electric field, which statement is correct

The diagram shows a pair of metal plates 4.0 mm apart connected to a 9.0 V battery.

What is the electric field between the plates?

Two horizontal parallel plate conductors are separated by a distance of 5.0 mm in air.

The lower plate is earthed and the potential of the upper plate is +50 V.

What is the electric field strength E at a point midway between the plates?

The diagram shows two parallel plates.

What is the electric field strength at point P?

An electron of charge e is introduced between two metal plates a distance d apart.

A potential difference V is applied to the plates.

Which expression gives the electric force F on the electron?

There is a force F acting on the charged particle due to the electric field.

The separation of the plates is doubled.

What will be the new force on the particle?

Two parallel plates, a distance 25 mm apart, have a potential difference between them of 12 kV.

What is the force on an electron?

(given e = 1.60 x 10^-19 C)

See the diagram, what is the force experience by an electron in the electric field between the plates?

(given e = 1.60 x 10^-19 C)

An electrons are accelerated and then directed into the uniform electric field between two parallel plates in a vacuum.

What best decribes the shape of the path followed by electtrons?

A very small oil drop of mass m carries a charge + q.

The potential difference across the plates is V and the separation is d.

THe weight of the drop is balanced by the electric force.

Which formula gives the charge on the drop?