1 What happens when a bar magnet is freely suspended? A It always points towards north-south B It always points towards east-west C It spins continuously D It loses its magnetism
2 According to the domain theory, a magnet is made of: A Small electric charges B Tiny magnetic domains C Large crystals D Non-magnetic atoms
3 According to the domain theory, what are magnetic domains? A Large magnets B Small regions where atomic magnets are aligned C Electric charges D Magnetic field lines
5 In the domain theory of magnetism, an unmagnetised piece of iron has domains that are: A All aligned in one direction B Randomly oriented C Completely absent D All pointing north
6 What is the direction of magnetic field lines outside a magnet? A From south pole to north pole B From north pole to south pole C Randomly D From inside to outside
7 What happens when the north pole of one magnet is brought near the north pole of another magnet? A They attract each other B They repel each other C They become neutral D They lose magnetism
9 What is the pattern of magnetic field lines around a bar magnet? A Straight lines from north to south B Closed loops from north to south outside the magnet C Circles around the magnet D Random lines
10 Which device uses an electromagnet? A Compass needle B Loudspeaker C Bar magnet D Horseshoe magnet
11 Which material is suitable for making a permanent magnet? A Soft iron B Steel C Copper D Aluminium
13 What is a neutral point in a magnetic field? A A point where the magnetic field is strongest B A point where the magnetic field is zero C A point where only the north pole is effective D A point where only the south pole is effective
14 The magnetic field is strongest at: A The poles of a magnet B The center of a magnet C Far away from the magnet D All points equally
15 When a magnet is heated strongly, its magnetism: A Increases B Decreases C Remains the same D Becomes stronger than before
16 Which method is used to magnetise a soft iron piece by placing it near a strong magnet? A Stroking method B Electrical method C Induction D Heating
17 The strength of an electromagnet does NOT depend on: A Number of turns of the coil B Current in the coil C Material of the core D Color of the wire
19 Hard disk drives store data using: A Magnetic domains B Optical pits C Electric charges D Sound waves
20 According to the domain theory, in an unmagnetized piece of iron, magnetic domains are: A All aligned in one direction B Randomly oriented C Completely absent D Always opposite to each other
21 Which device uses a permanent magnet to separate iron from other materials? A Loudspeaker B Magnetic separator C Door catch D Compass
22 The direction of a magnetic field at a point is given by: A The direction of a compass needle's north pole B The direction of a compass needle's south pole C The direction of an iron nail D The direction of a copper wire
23 A magnet attracts: A Only the north pole of another magnet B Only the south pole of another magnet C Both poles of another magnet D Neither pole of another magnet
24 Which material is most suitable for making a temporary magnet? A Soft iron B Steel C Copper D Plastic
25 What is the direction of a freely suspended bar magnet? A East-West B North-South C Random D Up-Down