Electric Fields (Edexcel International A Level (IAL) Physics): Multiple Choice Questions

A charge of $3.0\text{ μC}$ is moved from the 400 V equipotential of an electric field to the 150 V equipotential. It is then moved a distance of $0.20\text{ m}$ along the 150 V equipotential.

What is the magnitude of the total work done on the charge?

The electric potential V varies with the distance r from a charged object as shown.

At which distance, A, B, C or D, does the electric field strength have its maximum value?

The diagram shows two metal plates with a potential difference V across them.

The path of an electron travelling between the plates is shown.

The electron is deviated through an angle θ.

Which row of the table shows changes that will cause θ to decrease?

The diagram shows an oil droplet of mass $m$ between two parallel metal plates separated by a distance $d$. The upper plate is at potential $+V$ and the lower plate is at potential $-V$. The droplet is stationary.

What is the magnitude of the charge on the droplet?

Two charged spheres carry charges of $+4.0\times {10}^{-9}\text{ C}$ and $+2.0\times {10}^{-9}\text{ C}$. The distance between the centres of the spheres is $0.060\text{ m}$.

Which expression gives the magnitude of the force, in newtons, on each sphere?

The diagram shows the electric field lines around a point charge.

Which of the following diagrams best represents the equipotential lines around the point charge?