CHAPTER 18. ELECTROMAGNETISM 18.5
- A moving charged particle will experience aforce in a magnetic field.
Chapter 18 End of Chapter Exercises
- State the Right HandRule to determine the direction of a magnetic field around a
current carrying wire and the Right Hand Rule todetermine the directionof the
force experienced by a moving charged particle in a magnetic field. - What did Hans Oersted discover about the relationship between electricity and
magnetism? - List two uses of electromagnetism.
- Draw a labelled diagram of an electromagnet and show the poles ofthe
electromagnet on your sketch. - Transformers are useful electrical devices.
(a) What is a transformer?
(b) Draw a sketch of a step-down transformer.
(c) What is the difference between a step-downand step-up transformer?
(d) When would you use a step-up transformer? - Calculate the voltageon the secondary coil of a transformer if the voltage on the
primary coil is 22 000 Vand the ratio of primarywindings to secondary windings is
500:1. - You find a transformer with 1000 windings onthe primary coil and 200 windings
on the secondary coil.
(a) What type of transformer is it?
(b) What will be the voltage on the secondary coil if the voltage on theprimary
coil is 400 V?
IEB 2005/11 HG An electron moving horizontally in a TV tube enters aregion where there is a
uniform magnetic field.This causes the electronto move along the path(shown by
the solid line) because the magnetic field exertsa constant force on it. What is the
direction of this magnetic field?
TV screen
(a) upwards (towards the top of the page)
(b) downwards (towardsthe bottom of the page)
(c) into the page