ELECTRICITY AND MAGNETISM

ACTIVITY

1 a) How is static electricity formed?

b) Name the force that helps in the formation of static electricity.

2 a) How is lightning formed?

b) Why do hear thunder after we have seen lightning?

c) How can tall building be protected from the damages caused by lightning?

3 a) Why is not good to take shelter under a tree during a thunderstorm>

b) Give any two safety measures taken against lightning?

4 a) How do legumes benefit from lightning?

b) Which food do legumes make by the help of lightning?

c) Write down any three examples of legumes.

5. a) Why do most factories and industries prefer using hydroelectricity to thermal

electricity?

b) In which two ways is the use of thermal electricity unfriendly to the environment?

c) In which one way is the use of thermal electricity friendly to the environment?

6. a) What is the use of a solar inverter?

b) Why is a solar panel designed with dark colour

7. Why is a solar panel fixed outside on the roof of a house?

b) Give two ways in which the use of solar energy is friendly to the environment

8.  a) Identify one limitation of using solar energy.

b) State one advantage of using solar energy to man.

9.  a) Why is solar energy referred to as a renewable energy resource?

b) How has the use of electricity controlled deforestation in the environment?

10. a) Why is a fuse referred to as a safety device in an electric circuit?

b) From which alloy is a fuse made?

12.  a) How does a fuse control damage of an appliance in an electric circuit?

eb) Name any 3 appliances in which fuses are used