Electrical method. 

Back to: PRIMARY SEVEN P7 SCIENCE TOPICAL QUESTIONS AND ANSWERS

Electrical method.
Qn. What is electrical method?

• Electrical method is a method of making a magnet using electricity.
  An illustration showing the electrical method.

Qn. Name the magnet made by using the electrical method.

• Electro magnet
  Qn. State the factors that determine the strength of an electro magnet.
• The amount of current used.
• The number of turns in a coil.
• The magnetic substance used.
  Qn. Give any two ways of increasing the strength of an electro magnet.
• By increasing the voltage.
• By increasing the number of turns in a coil.
  Qn. State the use of electro magnets.
• Electro magnets are used in electric bells.
• Electro magnets are used in cranes to lift metal scrap.