Physics 9702 · AS & A Level
Electric field of a point charge
17 practice questions on Electric field of a point charge, with worked solutions and instant marking.
State one shared feature and one difference between the electric field lines and the gravitational field lines around an isolated positively charged metal sphere.
Feb/March 2017
State the meaning of an electric field.
Feb/March 2019
As shown in Fig. 6.1, two identical metal spheres A and B are both positively charged, and the distance between their centres is 24\,\text{cm}. Fig. 6.2 plots how the electric field strength E produced by the two spheres changes with distance x from the centre of A along the line joining the centres.
Feb/March 2020
Define electric field strength in words.
May/June 2012
Define electric field strength in terms of the force per unit positive charge on a stationary charge.
May/June 2012
State what electric field strength means.
May/June 2018
What does electric field strength mean?
May/June 2018
State what electric field strength means.
May/June 2019
State what electric field strength means.
May/June 2019
State one similarity and one difference between the force fields produced by an isolated point charge and by an isolated point mass.
May/June 2020
A metal sphere with radius $R$ is isolated in space. Point $P$ lies a distance $x$ from the sphere’s centre, as shown in Fig. 7.1. Fig. 7.2 shows how the electric field strength $E$ produced by the sphere’s charge changes with distance $x$.
May/June 2020
State one similarity and one difference between the force fields produced by an isolated point charge and by an isolated point mass.
May/June 2020
An isolated metal sphere of radius $r$ has been charged so that the electric field strength at its surface is $E_0$. On Fig. 6.1, sketch the way the electric field strength $E$ varies with distance $x$ from the centre of the sphere. Your sketch should go from $x = 0$ to $x = 3r$.
May/June 2021
An isolated metal sphere of radius $r$ carries charge so that the electric field strength at its surface is $E_0$. On Fig. 6.1, sketch how the electric field strength $E$ changes with distance $x$ from the centre of the sphere. Your sketch should run from $x = 0$ to $x = 3r$.
May/June 2021
State an equation for the electric field strength $E$ at distance $r$ from a point charge $Q$ in a vacuum. Also give the name of any other symbol used.
Oct/Nov 2019
Write an expression for the electric field strength $E$ a distance $r$ from a point charge $Q$ in a vacuum. State the name of any other symbol used.
Oct/Nov 2019
State the meaning of a field of force.
Oct/Nov 2020