Electromagnetism questions | form four Physics
Find Electromagnetism examination questions, form four Physics in acaproso.com
| # | Question |
|---|---|
| 1 | Under what circumstance are eddy currents formed?. Short answers |
| 2 | Give two advantages and two disadvantages of eddy currents. Short answers |
| 3 | A 250 V mains transformer has 1000 turns in the primary coil and it is used to supply Short answers |
| 4 | What is an induction coil? Short answers |
| 5 | Describe the structure of an induction coil and briefly explain its mode of action. Short answers |
| 6 | State the laws of electromagnetic induction. Short answers |
| 7 | Mention two advantages of a.c. generators over d.c. generators. Short answers |
| 8 | Briefly explain why the core of a transformer is made of thin layers of metal insulated from one another. Short answers |
| 9 | Describe the structure of a step-up transformer and state how it works. Short answers |
| 10 | A transformer with 4800 turns in the primary coil is designed to work form 240 V a.c. mains to give a supply of 8 V in order to ring a bell. Short answers |
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