1. What is the commercial method of generating electricity?
2. What are the principal parts of a dynamo?
3. Explain the principle of a dynamo.
4. The strength of a current depends upon what factors?
5. What is an induced current?
6. How may the direction of an induced current be determined?
7. What is a commutator?
8. What are armature brushes?
9. Describe the action of a dynamo.
10. Name and describe the different kinds of dynamos. .
11. What is the difference between alternating and direct currents?
12. What is an electric motor?
13. Describe the different kinds of electric motors. 14. Explain the expression "efficiency of a dynamo,"
15. Explain the care which should be given to a dynamo.
16. What is a transformer? Describe it.
17. What is a fuse? Describe it.
18. What is a circuit-breaker? Describe it.