Electric Fields & Field Lines (CIE A Level Physics)

An electron and positron are on the same straight line as shown in Fig 1.3. 

Fig 1.3

State the direction of the electric force at points

Calculate the force on the positron if it was accelerated through an electric field with a strength of 5.6 kV m^–1.

Fig 1.2 shows the positron near a negatively charged metal plate.

Fig 1.2

Sketch the field lines from the positron.

The positron is now replaced with a charge of +4e instead as shown in Fig 1.3.

Fig 1.3

Sketch the field lines of the +4e.

A potential difference is applied between two metal plates that are not parallel, as shown in Fig 1.1.

Fig 1.1

Sketch the electric field lines between the plates.

A proton is placed between the plates in Fig 1.1.

Calculate the acceleration of the proton when placed in a uniform electric field of field strength 6.0 × 10^–2 V m^–1_.