1 What is density? A Mass multiplied by volume B Volume divided by mass C Mass per unit volume D Weight per unit volume
2 Which formula represents density? A Density = Volume / Mass B Density = Mass × Volume C Density = Mass / Volume D Density = Weight / Volume
4 Which quantity is needed to calculate density? A Force B Pressure C Mass and volume D Temperature and mass
5 Which instrument is commonly used to measure mass? A Thermometer B Measuring cylinder C Balance D Stopwatch
6 How is the volume of an irregular solid measured? A Using ruler B Using measuring tape C By water displacement method D By thermometer
7 Which apparatus is used to measure volume of liquids? A Balance B Thermometer C Measuring cylinder D Spring balance
15 Particle model of matter explains: A Only solids B Only liquids C Structure and behavior of matter D Only gases
16 According to particle model, particles of matter are: A Stationary B Continuously moving C Invisible D Fixed in place
17 What happens to particle motion when temperature increases? A It stops B It decreases C It increases D It remains same
19 Which instrument is used to measure temperature? A Barometer B Thermometer C Hygrometer D Manometer
23 Calibration of thermometer means: A Cleaning the thermometer B Marking temperature scale C Filling liquid D Measuring pressure
25 Why is mercury suitable for thermometers? A It is colorful B It sticks to glass C It expands uniformly D It freezes easily
26 Sensitivity of thermometer depends on: A Length of stem B Thickness of bulb C Volume of bulb and capillary D Color of liquid
27 Range of thermometer means: A Accuracy B Maximum and minimum measurable temperature C Speed of response D Sensitivity
28 Linearity of thermometer means: A Equal divisions represent equal temperature change B Fast response C Wide range D High sensitivity
29 Which property of a magnet causes it to attract iron? A Electric charge B Magnetic field C Gravity D Friction
30 Which are the two ends of a magnet called? A Electric poles B Positive and negative ends C Magnetic poles D Charged ends
32 Unlike magnetic poles will: A Repel each other B Have no effect C Attract each other D Destroy each other
35 Magnetism produced in an unmagnetized material is called: A Permanent magnetism B Residual magnetism C Induced magnetism D Electric magnetism
36 Which magnet loses its magnetism easily? A Permanent magnet B Temporary magnet C Bar magnet D Earth magnet
37 Steel is commonly used to make permanent magnets because it: A Is cheap B Has high retentivity C Is soft D Conducts electricity
39 The region around a magnet where magnetic force is felt is called: A Electric field B Magnetic zone C Magnetic field D Force area
40 Magnetic field lines always emerge from: A South pole B Center of magnet C North pole D All sides equally
42 Magnetic field lines never: A Intersect each other B Form closed loops C Exist outside magnet D Exist inside magnet
43 The closeness of magnetic field lines indicates: A Direction of field B Strength of field C Type of magnet D Mass of magnet
44 Which device is used to detect the direction of magnetic field? A Ammeter B Voltmeter C Compass D Thermometer
45 Iron filings are used to: A Measure magnetic field B Plot magnetic field lines C Increase magnetism D Destroy magnet
46 The magnetic field inside a magnet is directed from: A North to South B South to North C East to West D West to East
47 Which of the following is a use of permanent magnets? A Electric bell B Transformer C Loudspeaker D Electromagnetic crane
48 An electromagnet works on the principle of: A Static electricity B Chemical reaction C Magnetic effect of current D Electrolysis
49 The strength of an electromagnet can be increased by: A Reducing current B Increasing number of turns C Using plastic core D Reducing turns
50 Which magnet can be switched ON and OFF? A Bar magnet B Permanent magnet C Electromagnet D Natural magnet
51 Domain theory explains magnetism due to: A Electric charges B Alignment of domains C Gravity D Heat energy
52 In an unmagnetized material, magnetic domains are: A Randomly oriented B Fully aligned C Absent D Very large
53 Ferromagnetic materials are: A Strongly attracted by magnets B Weakly attracted C Weakly repelled D Not affected
55 Paramagnetic materials are: A Strongly repelled B Strongly attracted C Weakly attracted D Not affected
56 Diamagnetic materials are: A Strongly attracted B Weakly attracted C Weakly repelled D Strongly magnetized
59 The direction of Earth’s magnetic field is from: A Geographic North to South B Geographic South to North C East to West D West to East
60 A compass needle aligns itself along: A Electric field B Earth’s magnetic field C Gravitational field D Solar radiation
61 Which application uses magnetism in data storage? A LCD screen B Hard disk C Calculator D Solar panel
62 Magnetic shielding is used to: A Increase magnetic field B Reduce unwanted magnetic fields C Create electricity D Store data