16 Resultant of two vectors at right angles is found using: A Addition law B Subtraction law C Pythagoras theorem D Newton’s law
17 Which instrument is used to measure length accurately? A Measuring tape B Meter rule C Vernier caliper D Stopwatch
19 Least count means: A Maximum value of instrument B Minimum value measurable C Average value D Error value
24 Scientific notation is used to express: A Very small and very large numbers B Only small numbers C Only large numbers D Whole numbers
30 Accuracy refers to: A Repeated measurements B Closeness to true value C Instrument quality D Least count
31 Precision refers to: A Closeness to true value B Repeated consistency C Instrument size D Unit used
32 Which causes error in measurement? A Instrument fault B Human mistake C Environmental effects D All of these
33 Zero error occurs when: A Scale is broken B Instrument reads zero incorrectly C Observer is careless D Value is large
34 Random errors can be reduced by: A Single reading B Changing instrument C Taking average of readings D Ignoring readings
41 Which of the following best defines motion? A Change in shape of an object B Change in position with respect to time C Change in speed only D Change in size of an object
42 Which type of motion is shown by a spinning top? A Linear motion B Circular motion C Random motion D Oscillatory motion
44 Distance is defined as: A Shortest path between two points B Total length of path traveled C Change in position with direction D Speed multiplied by time
45 Displacement can be zero even when: A Distance is zero B Time is zero C Distance is not zero D Speed is constant
47 Speed is calculated by the formula: A Distance ÷ Time B Displacement ÷ Time C Acceleration × Time D Velocity ÷ Time
49 Average speed is defined as: A Final speed minus initial speed B Total distance divided by total time C Displacement divided by time D Instantaneous speed at a point
50 Which instrument is commonly used to measure speed of vehicles? A Thermometer B Speedometer C Barometer D Ammeter
51 Instantaneous speed is the speed: A At the start of motion B At the end of motion C At a particular instant D Averaged over time
52 Uniform velocity means: A Speed changes with time B Direction changes with time C Equal displacement in equal intervals of time D Unequal displacement in equal intervals
53 Non-uniform velocity occurs when: A Speed and direction both remain constant B Speed or direction changes C Distance is zero D Acceleration is zero
54 Acceleration is defined as: A Change in speed B Change in velocity per unit time C Speed multiplied by time D Distance divided by time
56 Uniform acceleration means: A Acceleration changes with time B Velocity remains constant C Equal change in velocity in equal time intervals D Speed remains zero
57 Which of the following is an example of uniform acceleration? A Car moving in traffic B Falling object under gravity C Fan rotating D Train stopping suddenly
59 A horizontal line on a distance-time graph shows: A Uniform speed B Increasing speed C Object at rest D Uniform acceleration
61 Area under a speed-time graph represents: A Acceleration B Velocity C Distance traveled D Time taken
62 If speed-time graph is a straight line sloping upwards, motion has: A Zero acceleration B Uniform acceleration C Non-uniform acceleration D Uniform velocity
63 If the slope of speed-time graph is zero, the object has: A Uniform acceleration B Increasing speed C Uniform speed D Zero distance
64 Motion under gravity is an example of: A Uniform velocity B Uniform acceleration C Non-uniform acceleration D Circular motion
65 The value of acceleration due to gravity on Earth is approximately: A 9.8 m/s B 9.8 m/s² C 8.9 m/s² D 10 m/s
66 Acceleration due to gravity acts: A Upward B Horizontally C Downward toward Earth’s center D Randomly
67 When an object is thrown upward, its acceleration is: A Zero B Increasing C Decreasing D Equal to g downward
68 At the highest point of a vertically thrown object, its velocity is: A Maximum B Minimum C Zero D Equal to g
69 Which graph represents uniform velocity? A Straight line distance-time graph B Curved distance-time graph C Sloping speed-time graph D Curved speed-time graph
70 Negative acceleration is also called: A Uniform acceleration B Retardation C Instantaneous speed D Velocity
72 If an object covers equal distances in unequal intervals of time, its motion is: A Uniform B Non-uniform C Circular D Periodic
73 Universal speed limit refers to: A Speed of sound B Escape velocity C Speed of light D Orbital speed
74 The speed of light in vacuum is approximately: A 3 × 10^6 m/s B 3 × 10^7 m/s C 3 × 10^8 m/s D 3 × 10^9 m/s
75 Mass of a body is defined as: A Force acting on the body B Quantity of matter in the body C Weight of the body D Volume of the body
77 Mass of a body remains: A Same everywhere B Different on Moon C Zero in space D Dependent on gravity
78 Inertia is the property of a body due to which it: A Moves faster B Changes shape C Resists change in its state D Stops moving
85 Gravitational field strength is defined as: A Force per unit mass B Mass per unit force C Energy per unit mass D Weight per unit volume
87 Value of gravitational field strength on Earth is approximately: A 1 N/kg B 4.9 N/kg C 9.8 N/kg D 98 N/kg
88 Which instrument is used to measure mass? A Spring balance B Force meter C Electronic balance D Thermometer
89 Which instrument is used to measure weight? A Electronic balance B Beam balance C Spring balance D Stopwatch
91 Force that acts only when bodies are in contact is called: A Gravitational force B Magnetic force C Contact force D Electric force
92 Which of the following is a contact force? A Gravitational force B Friction C Magnetic force D Electric force
93 Force that acts without physical contact is called: A Contact force B Applied force C Non-contact force D Frictional force
97 Free body diagram represents: A Motion of body B All forces acting on a body C Shape of body D Velocity of body
99 Newton’s First Law of Motion is also called: A Law of acceleration B Law of inertia C Law of action-reaction D Law of gravitation
100 According to Newton’s First Law, a body remains at rest if: A Net force is zero B Force is applied C Mass is large D Velocity is high
101 Newton’s First Law applies to bodies in: A Only rest B Only motion C Rest or uniform motion D Accelerated motion only
102 Net force zero means body has: A Increasing speed B Decreasing speed C Constant velocity D Changing direction
103 Effect of force on velocity can be: A Change in speed B Change in direction C Change in both D No change
104 A force can change the direction of velocity as in: A Straight line motion B Circular motion C Rest position D Equilibrium
107 If net force on a body is not zero, body will: A Remain at rest B Move with constant velocity C Accelerate D Stop moving
109 Mass measured by electronic balance depends on: A Gravity B Spring constant C Comparison with standard mass D Temperature
110 Which force is responsible for weight? A Magnetic force B Electric force C Gravitational force D Nuclear force
113 Force is a vector quantity because it has: A Magnitude only B Direction only C Magnitude and direction D No unit
114 Which force keeps planets in their orbits? A Frictional force B Magnetic force C Gravitational force D Nuclear force
115 The tendency of a body to oppose change in motion is called: A Momentum B Force C Inertia D Velocity
116 What is meant by the resultant force? A Force that stops motion B Single force having same effect as multiple forces C Force due to gravity only D Force applied by an object
117 If all forces acting on a body cancel each other, the resultant force is: A Maximum B Minimum C Zero D Infinite
118 Newton’s Second Law of Motion relates force with: A Velocity B Momentum C Acceleration D Distance
121 If mass of a body is doubled and force remains same, acceleration will: A Double B Become half C Remain same D Become zero
122 Newton’s Third Law of Motion states that: A Force equals mass times acceleration B Every action has an equal and opposite reaction C Body remains at rest or in motion D Momentum is conserved
123 Action and reaction forces act on: A Same body B Different bodies C Same direction D Same surface
124 Which of the following is an example of action-reaction pair? A Weight and mass B Push on wall and wall pushing back C Friction and gravity D Speed and velocity
125 Why does a gun recoil when a bullet is fired? A Due to gravity B Due to friction C Due to Newton’s Third Law D Due to inertia
133 Which of the following increases impulse? A Decreasing time B Increasing time C Decreasing force D Decreasing momentum
134 Why are airbags used in cars? A To increase speed B To decrease force by increasing time C To reduce mass D To stop motion instantly
135 Principle of conservation of momentum states that: A Momentum always increases B Momentum is lost in collisions C Total momentum remains constant D Momentum depends on force
136 What happens to the shape of a body when a force is applied? A It always breaks B It may change C It becomes heavier D It stops moving
137 What is deformation? A Change in mass B Change in volume only C Change in shape or size D Change in temperature
138 Which force can change the size of a body? A Balanced force B Applied force C Gravitational force only D Magnetic force only
139 Elasticity is the property of a material to: A Break easily B Change color C Regain original shape D Increase mass
143 What is the spring constant? A Force per unit mass B Extension per unit force C Force per unit extension D Area per unit force
145 A stiffer spring has: A Smaller spring constant B Zero spring constant C Larger spring constant D Negative spring constant
146 In a load-extension graph, the straight line shows: A Breaking point B Elastic behavior C Plastic behavior D Failure point
147 The limit of proportionality is the point where: A Graph becomes horizontal B Extension stops C Force is zero D Graph stops being straight
148 Beyond elastic limit, a material: A Returns to original shape B Shows permanent deformation C Becomes rigid D Stops stretching
152 Why do sharp knives cut better? A They have more mass B They reduce force C They increase pressure D They reduce friction
153 Atmospheric pressure is due to: A Weight of water B Weight of air C Earth’s rotation D Sun’s heat
155 Why is atmospheric pressure lower on mountains? A More air B Less air above C More gravity D Higher temperature
156 Which instrument measures atmospheric pressure? A Manometer B Thermometer C Barometer D Hygrometer
158 Standard atmospheric pressure is equal to: A 76 cm of mercury B 10 cm of mercury C 1 cm of mercury D 760 cm of mercury
159 A manometer is used to measure: A Atmospheric pressure only B Liquid pressure only C Gas pressure D Temperature
160 Liquid pressure depends on: A Shape of container B Depth of liquid C Color of liquid D Area of container
163 Pascal’s Law states that pressure applied to a confined liquid: A Acts upward only B Acts downward only C Is transmitted equally D Is reduced
165 Which is an application of Pascal’s Law? A Barometer B Hydraulic lift C Thermometer D Speedometer
166 Why do camels have wide feet? A To run fast B To increase pressure C To decrease pressure D To reduce weight
167 Pressure at the bottom of a lake is: A Zero B Less than surface C More than surface D Equal to surface
169 What happens to pressure if force doubles and area halves? A No change B Doubles C Triples D Becomes four times
170 A body is in equilibrium when its: A acceleration is zero. B speed is zero. C velocity is non-uniform. D displacement is zero.
171 A couple is formed by: A two forces perpendicular to each other. B two equal and opposite forces not in the same line. C two equal and opposite forces in the same line. D two unequal forces.
172 The vertical or perpendicular component of a force F making an angle θ with the horizontal x-axis is given by: A F cos(θ) B F tan(θ) C F sin(θ) D F cot(θ)
174 The centre of gravity of an irregularly shaped thin lamina can be found using a: A Plumb line B Screw gauge C Vernier callipers D Metre rule