1. Which of the following materials is naturally magnetic?
A) Copper
B) Iron
C) Aluminum
D) Lead
Answer: B) Iron
2.A magnet has two poles because
A) Magnetic lines of force are closed loops
B) Magnetic force exists only at ends
C) Magnetic monopoles do not exist
D) Both A and C
Answer: D) Both A and C
3. The region around a magnet where magnetic forces can be detected is called
A) Magnetic flux
B) Magnetic field
C) Magnetic domain
D) Magnetic intensity
Answer: B) Magnetic field
4. Which of the following is the strongest type of magnet?
A) Temporary magnet
B) Electromagnet
C) Permanent magnet
D) Lodestone
Answer: B) Electromagnet
5. The lines of a magnetic field around a bar magnet emerge from
A) South pole
B) North pole
C) Both poles
D) Center of magnet
Answer: B) North pole
6. Magnetic materials are divided into
A) Ferromagnetic, Paramagnetic, Diamagnetic
B) Conductor, Insulator, Semiconductor
C) Ionic, Covalent, Metallic
D) None of the above
Answer: A) Ferromagnetic, Paramagnetic, Diamagnetic
7. Which of the following is a diamagnetic material?
A) Iron
B) Copper
C) Nickel
D) Cobalt
Answer: B) Copper
8. Which type of magnet loses its magnetism easily?
A) Temporary magnet
B) Permanent magnet
C) Electromagnet
D) Lodestone
Answer: A) Temporary magnet
9. An instrument that uses a magnet to measure current is called
A) Galvanometer
B) Ammeter
C) Voltmeter
D) Ohmmeter
Answer: A) Galvanometer
10. Magnetic field lines never
A) Form closed loops
B) Intersect each other
C) Emerge from poles
D) Curve around magnets
Answer: B) Intersect each other
11. The SI unit of magnetic flux density is
A) Tesla
B) Gauss
C) Weber
D) Ampere
Answer: A) Tesla
12. The process of making a material magnetic by rubbing it with a magnet is called
A) Induction
B) Magnetization
C) Polarization
D) Demagnetization
Answer: B) Magnetization
13. The north pole of a magnet is attracted to
A) North pole of another magnet
B) South pole of another magnet
C) Neutral material
D) Both poles equally
Answer: B) South pole of another magnet
14. Which material is strongly ferromagnetic?
A) Aluminum
B) Nickel
C) Copper
D) Zinc
Answer: B) Nickel
15. What happens when a bar magnet is heated to a very high temperature?
A) Becomes stronger
B) Loses magnetism
C) Poles interchange
D) Becomes temporary magnet
Answer: B) Loses magnetism
16. Magnetic domains are
A) Small regions where magnetic moments are aligned
B) Areas with no magnetism
C) Magnetic lines of force
D) Regions outside the magnet
Answer: A) Small regions where magnetic moments are aligned
17. Earth itself behaves like a giant
A) Electromagnet
B) Permanent magnet
C) Solenoid
D) Diamagnet
Answer: B) Permanent magnet
18. The unit of magnetic flux is
A) Tesla
B) Weber
C) Ampere
D) Newton
Answer: B) Weber
19. The needle of a compass points toward
A) Magnetic north pole
B) Geographic north pole
C) Magnetic south pole
D) Geographic south pole
Answer: A) Magnetic north pole
20. Which of these metals is least affected by a magnet?
A) Iron
B) Cobalt
C) Aluminum
D) Nickel
Answer: C) Aluminum
21. A solenoid acts like a magnet when
A) Current passes through it
B) It is shaken
C) Heated
D) Immersed in water
Answer: A) Current passes through it
22. The magnetic effect of an electric current was discovered by
A) Michael Faraday
B) Hans Christian Ørsted
C) James Clerk Maxwell
D) Alessandro Volta
Answer: B) Hans Christian Ørsted
23. Magnetic field inside a long straight solenoid is
A) Uniform and parallel
B) Divergent
C) Zero
D) Circular
Answer: A) Uniform and parallel
24. The substance used to make permanent magnets is
A) Iron
B) Steel
C) Aluminum
D) Copper
Answer: B) Steel
25. Magnetic lines of force are closer near
A) Poles
B) Center
C) Middle of magnet
D) Outside the magnet
Answer: A) Poles
26. The SI unit of magnetic moment is
A) Tesla
B) Ampere-meter²
C) Weber
D) Newton
Answer: B) Ampere-meter²
27. The phenomenon of inducing magnetism in a material without touching it is called
A) Electromagnetism
B) Magnetic induction
C) Demagnetization
D) Polarization
Answer: B) Magnetic induction
28. A freely suspended magnet always aligns itself in
A) North-South direction
B) East-West direction
C) Any random direction
D) Horizontal direction
Answer: A) North-South direction
29. Which of the following is not a property of magnetic lines of force?
A) They never intersect
B) They form closed loops
C) They start from south pole
D) They indicate direction of magnetic force
Answer: C) They start from south pole
30. The magnet used in electric motors is usually
A) Temporary magnet
B) Permanent magnet
C) Electromagnet
D) Lodestone
Answer: C) Electromagnet