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Class 10 Science Chapter 12 Practice Question Answers - Magnetic Effects of Current

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(i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil?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

The document Class 10 Science Chapter 12 Practice Question Answers - Magnetic Effects of Current is a part of the Class 10 Course Science Class 10.
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FAQs on Class 10 Science Chapter 12 Practice Question Answers - Magnetic Effects of Current

1. What is the magnetic effect of current?
Ans. The magnetic effect of current refers to the phenomenon where a current-carrying conductor produces a magnetic field around itself. This magnetic field can affect nearby magnetic materials or other current-carrying conductors.
2. How is the magnetic effect of current related to electromagnetism?
Ans. The magnetic effect of current is one of the fundamental principles of electromagnetism. When an electric current flows through a conductor, it creates a magnetic field around the conductor. This relationship between electricity and magnetism forms the basis of electromagnetism.
3. How can the direction of a magnetic field produced by a current-carrying conductor be determined?
Ans. The direction of the magnetic field produced by a current-carrying conductor can be determined using the right-hand rule. If you point your right thumb in the direction of the current, the curled fingers of your right hand will indicate the direction of the magnetic field lines.
4. What is the difference between a permanent magnet and an electromagnet?
Ans. A permanent magnet is a material that has its own persistent magnetic field, whereas an electromagnet is a magnet created by passing an electric current through a coil of wire. The magnetic field of an electromagnet can be controlled by varying the current, whereas the magnetic field of a permanent magnet is fixed.
5. How is the magnetic effect of current used in everyday life?
Ans. The magnetic effect of current is used in various everyday applications. Some examples include electric motors, generators, transformers, loudspeakers, and magnetic levitation systems. These devices rely on the interaction between magnetic fields and current-carrying conductors to function.
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