WCS 1104-2 - Knowledge Assessment

If a magnet breaks or is cracked, it becomes two stronger magnets. True or false?

• True

• False

Which of the following below about magnetism is/are wrong?

• Magnets only have one pole
• Magnets lose their magnetism over time
• Magnetism is caused by the flow of electricity
• Magnet attracts metal object

Which of the following below about electromagnetism is/are correct?

• Magnetic field can be control

• Relationship between magnetism and electricity

• Weaker than conventional magnets

• Stronger than conventional magnets

How to strengthen the magnetic field on electromagnet?

• Place an iron core in center of coil

• Increase number of core

• Increase number of turns of wire in coil

• Increase current flow through coil

• Increase voltage flow through coil

Which hand rule for electron flow theory?

(a)  

Which hand rule for conventional theory?

(a)  

What are the ends of magnet called?

• North poles

• North ends

• South poles

• South ends

Which of the following below is/are the part of an electromagnet?

• Iron

• Wire

• Power source

• Coil

• Current flow

What happens when north & south poles of magnet are placed together?

• They repel

• They attract

• They cancel each other out

• The strength of the magnet is doubled

Which of the following below is/are the other name for magnetic lines?

• Flus lines

• Magnetic flux

• Flux lines

• Magnetic flus

• Magnet flux