Question

question 3. (10 marks) state whether the following are true or false. if false if change the highlighted word to make the statement true

• the earth is a giant magnet with north and south poles
• alternating current = eskom/mains electricity,

direct current = battery power

• an electromagnet is a temporary magnet. loses its magnetic field after some time.
• natural disasters are floods, earthquakes, volcanic eruptions, hurricane/

tornados.

• same pole magnets repel each other. opposite poles attract each other

Explanation:

• The Earth has a magnetic field similar to a giant magnet with North and South Poles.
• Alternating Current (AC) is commonly used in mains electricity (like Eskom supply), and Direct Current (DC) is typical of battery power.
• An electromagnet is a temporary magnet as its magnetic field depends on an electric current. When the current stops, the magnetic field (usually) ceases.
• Floods, earthquakes, volcanic eruptions, and hurricanes/tornados are all natural disasters.
• Like poles of magnets repel, and opposite poles attract.

Answer:

• All statements are True.