1 Which of the following is true about the magnetic field of a solenoid? A It is weak inside B It is uniform inside C It is zero inside D It is strongest at the ends
3 What is the direction of magnetic field lines inside a magnet? A North to south B South to north C East to west D West to east
5 Which of the following is used to make a loudspeaker? A Permanent magnet B Electromagnet C Both A and B D Soft iron core
7 Where is the magnetic field strongest in a bar magnet? A In the middle B At the poles C Equally everywhere D At the surface
8 What is the Earth's magnetic pole near the geographic north pole actually? A Magnetic north pole B Magnetic south pole C Both D Neither
9 What is the shape of the magnetic field around a straight current-carrying wire? A Straight lines B Circular loops C Elliptical D Random
10 What is the name of the temporary magnet made by wrapping a current-carrying coil around an iron core? A Bar magnet B Electromagnet C Permanent magnet D Horseshoe magnet
11 What is the effect of breaking a bar magnet into two pieces? A Two pieces become weaker B Each piece becomes a complete magnet C Pieces lose magnetism D Pieces become non-magnetic
12 What is the name of the property of a material to become magnetized when placed in a magnetic field? A Susceptibility B Permeability C Retentivity D Reluctance
13 Which of the following is used to measure magnetic flux? A Gaussmeter B Fluxmeter C Teslameter D All of the above
14 What is the name of the phenomenon where a magnetic field induces a current in a conductor? A Magnetic induction B Electromagnetic induction C Magnetic flux D Magnetic resonance
15 What happens when the north pole of one magnet is brought near the north pole of another magnet? A They attract B They repel C They stick together D They become stronger
17 Which of the following is used to store data in a computer hard disk? A Permanent magnet B Electromagnet C Magnetic domains D Magnetic tape
18 Which instrument is used to detect the presence of a magnetic field? A Thermometer B Compass C Barometer D Hygrometer
19 Which of the following represents the magnetic field lines correctly? A They cross each other B They never cross C They are parallel D They are circular
20 What is the direction of the magnetic field at a point? A Direction of force on a north pole B Direction of force on a south pole C Tangential to field line D Both A and C
22 What is the direction of magnetic field lines outside a magnet? A From south to north B From north to south C From east to west D From west to east
23 Which of the following is used to make the core of an electromagnet? A Steel B Soft iron C Cobalt D Nickel
25 Which of the following is a way to make a permanent magnet? A Rubbing with another magnet B Placing in a magnetic field C Both A and B D Heating and cooling