Forces on charged particles

1

Select the most accurate description of electric field lines.

2

In which direction do the arrows of electric field lines point?

3

How can the unit of electric potential, the volt (V), also be expressed?

4

Calculate the kinetic energy of an electron of charge 1.6 \times 10^{-19}C accelerated by a potential difference of 2500 V.

5

An electron of mass 9.11 \times 10^{-31}kg has a kinetic energy of 4 \times 10^{-16}J. Calculate the speed of the electron.

6

If a vertical wire has a downward flowing current of electrons describe the resulting magnetic field.

An electric wire runs vertically. A current passes through it from top to bottom.

7

A magnetic field is set up going into the screen and a wire carrying an electron current flows left to right across the field.

In which direction will the wire experience a force?

A magnetic field travels into the screen away from the viewer. A wire lies horizontally in the field. A current runs through the wire from left to right.

8

An electron moving left to right enters a magnetic field pointing out of the screen. Describe the motion of the electron just as it enters the field.

A magnetic field travels out of the screen towards the viewer. An electron crosses it from left to right.

9

An electron is travelling through a large area subject to a strong magnetic field.

Which of the following statements best describes its path?

10

What use is made of a strong magnetic field inside a cyclotron?