WILLER ACADEMY

Class 10 Science Chapter 13 Quiz

Magnetic Effects of Electric Current

1. The direction of the magnetic field produced by a straight current-carrying wire is given by:
a) Fleming’s left hand rule b) Right hand thumb rule c) Lenz’s law d) Ampere’s law

2. The magnetic field lines inside a long straight current-carrying solenoid are:
a) Circular b) Parallel and straight c) Elliptical d) Irregular

3. What happens to the direction of the magnetic field if the direction of current is reversed in a conductor?
a) It remains unchanged b) It reverses c) It becomes perpendicular d) It vanishes

4. The strength of the magnetic field at the centre of a circular loop carrying current is:
a) Maximum b) Minimum c) Zero d) Same as at any other point

5. Which of the following correctly represents the magnetic field lines around a bar magnet?
a) They emerge from the south pole and merge at the north pole outside the magnet b) They emerge from the north pole and merge at the south pole outside the magnet c) They are open curves d) They intersect each other

6. State the Right Hand Thumb Rule. (2 marks)

7. What is a solenoid? Draw a diagram to show the magnetic field inside a solenoid. (2 marks)

8. List two properties of magnetic field lines. (3 marks)

9. Why do magnetic field lines never intersect each other? (3 marks)

10.
a) What happens when a soft iron core is placed inside a current-carrying solenoid? Name the device formed.
b) State two uses of electromagnets. (5 marks)

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