A deflection tube is placed between the poles of an electromagnet. A beam of electrons navels through the tube in the direction shown in the diagram.

a. Which of the following statements most accurately describes what happens to the beam when the electromagnet is switched on?

A It is deflected (bent) towards one of the poles.

B It is deflected upwards or downwards.

b. The direction of deflection can be found using Fleming's left-hand rule. To use it, you need to know the conventional current direction. How is that related to the direction of electron flow?

c. Use Fleming's left-hand rule to work out the direction in which the beam is deflected.

Transcribed Image Text:

electron N beam poles of electromagnet after switch on