CBSE class 10 - Magnetic Effects of Electric Current important questions Set B
1. A closed circular coil of copper wire is connected to a galvanometer. Now, what will happen if a bar magnet is –
(i) pushed towards the coil
(ii) withdrawn from inside the coil
(iii) held stationary inside or nearby the coil.
2. What do you mean by magnetic field lines are continuous closed loops? Explain.
3. Assertion -A current-carrying conductor experiences a force in a magnetic field.
Reason – The net charge of a current-carrying conductor is zero.
4. Which finger indicates the direction of the magnetic field on the conductor in Fleming’s left-hand rule?
5. Why does a current-carrying freely suspended solenoid rest along a particular direction?
6. (a) Write Fleming’s left-hand rule for a current-carrying conductor placed in a magnetic field.
(b) Draw a diagram to show the magnetic field line inside and outside of a current-carrying solenoid.
7. Which instrument can convert mechanical energy into electrical energy?
8. Name three instruments where Electromagnetic induction is used?
9. What is the working principle of an AC generator?
10. The phenomenon of producing an electric current in a coil whenever there is a relative velocity between magnet and coil is known as ……………………..?
11. Match the following column-
|
Section A |
Section B |
|
Electric motor |
Converts electric energy into mechanical energy |
|
Electric generator |
Heating effect of electric current |
|
False |
Converts mechanical energy into electrical energy |
11. How we can increase the strength of a magnetic field of a current-carrying solenoid?
12. An alternating current can not produce any magnetic field. [ True / False ]
13. The magnetic field at the centre of a circular loop carrying current is zero. [ True / False ]
14. Why series arrangement is not used for connecting domestic appliances?
15. Define the importance of magnetic field line. Why they do not intersect each other?
Class 10 – Magnetic Effects of Electric Current important questions pdf download
16. What is the shape of magnetic field lines around a straight current-carrying conductor?
17. How the magnetic field strength will change inside a current-carrying solenoid if we insert a soft bar within it?
18. Explain Fleming’s right-hand rule with the help of a labelled diagram.
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