Question

class 7 science inside questions of chapter 14​

Answer 1

Explanation:

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Answer 2

Answer:

1. Explain the concept of electric bell ?
2. What is electromagnet ?
3. Who is Hans Christian Oersted ?
4. What are MCBs ? How do they work ?
5. Why are CFL preferred over electric bulb ?
6. Distinguish between open circuit and closed circuit ?
7. Why is an electric fuse of requires in all electrical appliances ?
8. How is fuse useful ?