- Types of Transformer
- characteristics of primary and secondary coils
How are the e.m.f in the primary and secondary coils of a transformer related with the number
of turns in these coils?
In an electric motor the energy transformation is:
(a) from electrical to chemical
(b) from chemical to light
(c) from mechanical to electrical
(d) from electrical to mechanical
The adjacent diagram shows a small magnet placed near a solenoid AB. Current is switched on in the solenoid by pressing the key K. (a) State the polarity at the ends A and B. (b) will the magnet be attracted or repelled? Give a reason for your answer.
What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?
Complete the following sentence :
………………….. energy is converting into …………. energy by an electric generator.