dont fail

Question 1

GIve some examples of magnetic materials

Answer 1

Iron coblat nickel and aluminium

Question 2

Name 3 properties of a magnet

Answer 2

” magnetic poles: North and south
like poles repel
opposite poles attract

Question 3

State and explain 3 uses of magnets in our everyday life

Answer 3

Electronics: Magnets are used in speakers and headphones to vibrate and create sounds

Health care: MRI machines use powerful magents to create detailed images of internal organs

Transportation: maglev trains use magnets for frictionless high speed travel

Question 4

What is the difference betweeen soft and hard magnetic materials

Answer 4

Soft magnetic materials are easy to magnetize and are often used in making temporary magnets while hard magnetic materials retain their magnetism and are used for making permamnent magnets

Question 4

What are the advantages of an electrmagnet

Answer 4

Can easily be manipulated
Stronger than permanent magnets

Question 5

In the motor effect the turning effect on the coil can be increased by

Answer 5

Increasing the current
Using a stronger magnet
Increasing the number of turns on the coil

Question 5

How do you increase the strength of an electromagent

Answer 5

Increasing the number of turns on the coil
Increasing the current
Increasing the length of wire
increasing the cros sectional are of wire because the thicker the wire the less resistance

Question 5

what is the motor effect

Answer 5

The motor effect is when the magnetic field of the wire due to its current interacts with the magnetic field of the magnet making the wire experience force and move.

Question 6

What is the generator effect

Answer 6

The generator effect is when the magnetic field lines are being cut which results to a changing magnetic field that produces voltage

Question 7

What is a transformer

Answer 7

A transformer is a device that either increases or decreases the voltage from an ac supply.