Electric Current and its Effect
Q.1. What is an electric circuit?
Q.2. Name the simplest source of electric current?
Q.3. What are the components needed to create a simple circuit?
Q.4. What are the symbols of electric cell, battery, electric bulb, switch in on position , switch on off position?
Q.5. What is a battery?
Q.6. What is a circuit diagram?
Q.7. When is a bulb said to be fused?
Q.8. What is the heating effect of current?
Q.9. Name some appliances where heating effect of current is used.
Q.10. What is a heating element in an appliance?
Q.11. On what factors the amount of heat produced in a wire depends.
Q.12. Name the material of which an element is made.
Q.13. Name the material of which the bulb's filament is made?
Q.14. What can we use in place of a bulb to reduce wastage of electricity?
Q.15. What is an electric fuse?
Q.16. What is the property of a fuse?
Q.17. What is the symbol of a fuse?
Q.18. What are the causes of excessive electric current?
Q.19. What are miniature circuit breakers (MCBs)?
Q.20. What is a compass?
Q.21. What happens when we increase the number of coils?
Q.22. Who first observed the magnetic effect of electric current?
Q.23. Can electric current be used to produce magnets?
Q.24. What is the unit of electric current?
Q.25. What is a solenoid?
Q.26. What is an electromagnet?
Q.27. On what factors does the strength of an Electromagnet depend?
Q.28. What are the uses of electromagnets?
Q.29. On what principle is the working of an electric bell based?
Q.30. Explain the working of an electric bell.
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