Solved Practice Questions: Magnetic Effect of Current

# Solved Practice Questions: Magnetic Effect of Current Notes | Study Science Class 10 - Class 10

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Short Questions

1. Why does a compass needle get deflected when brought near a bar magnet ?

2. Draw magnetic field lines around a bar magnet.

3. List the properties of magnetic lines of force.

4. Why don't two magnetic lines of force intersect each other ?

5. Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.

6. The magnetic field in a given region is uniform. Draw a diagram to represent it.

7. State Fleming's left-hand rule.

8. Explain different ways to induce current in a coil.

9. Name some sources of direct current.

10. Which sources produce alternating current ?

11. An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5A. What result do you expect ? Explain.

12. Name two safety measures commonly used in electric circuits and appliances.

13. What precaution should be taken to avoid the overloading of domestic electric circuits ?

14. In household circuits, is a fuse wire connected in series or in parallel ?

15. In which wire, (in A.C. circuit), switch is introduced to operate the light?

16. List three sources of magnetic fields.

17. How does a solenoid behave like a magnet? Can you determine the north and south poles of a current carrying solenoid with a help of bar magnet? Explain.

18. When is the force experienced by a current carrying conductor placed in a magnetic field is largest?

19. Think that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?

20. A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is

(i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil?

21. Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B ? Give reason.

22. State the rule to determine the direction of a

(i) magnetic field produced around a straight conductor carrying current.

(ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and

(iii) current induced in a coil due to its rotation in a magnetic field.

23. What is the function of an earth wire ? Why is it necessary to earth metallic appliances ?

24. A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it ?

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## Science Class 10

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