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PHYSICS MCQs

100 Questions TextBook
1

Which of the following is a non-physical quantity?

A
length
B
mass
C
love
D
time
2

A measurement consists of a number and a what?

A
symbol
B
prefix
C
unit
D
magnitude
3

How many base units are there in the International System of Units (SI)?

A
5
B
7
C
9
D
10
4

The SI unit for the amount of substance is?

A
gram
B
mole
C
candela
D
ampere
5

Which of the following is a derived quantity?

A
temperature
B
speed
C
mass
D
length
6

The unit 'pascal' (Pa) is a derived unit for which quantity?

A
force
B
energy
C
pressure
D
charge
7

The prefix 'giga' (G) represents a power of?

A
10^6
B
10^9
C
10^12
D
10^3
8

The prefix 'pico' (p) corresponds to which power of ten?

A
10^-9
B
10^-15
C
10^-6
D
10^-12
9

What is 1000 grams equal to?

A
1 milligram
B
1 megagram
C
1 kilogram
D
1 centigram
10

The expression 5.2 x 10^-11 m is an example of?

A
a prefix
B
a base unit
C
scientific notation
D
a derived quantity
11

The kilogram is the only base unit that has a?

A
symbol
B
prefix
C
standard definition
D
decimal value
12

The smallest measurement that can be taken accurately with a metre rule is?

A
0.1 mm
B
1 cm
C
1 mm
D
0.5 mm
13

The error caused by reading an instrument from an incorrect angle is known as?

A
zero error
B
systematic error
C
human error
D
parallax error
14

The least count of a standard Vernier Callipers is typically?

A
0.1 mm
B
0.01 mm
C
1 mm
D
0.5 mm
15

A Vernier (sliding) scale of a standard calliper is 9 mm long and is divided into how many equal parts?

A
5
B
20
C
15
D
10
16

Which part of the Vernier Callipers is used to measure the internal dimension of an object?

A
Jaws A and B
B
Jaws C and D
C
The tail
D
The main scale
17

If the zero of the Vernier scale is on the right side of the main scale's zero when jaws are closed, the zero error is considered?

A
positive
B
negative
C
neutral
D
zero
18

A positive zero error in a Vernier Callipers is corrected by?

A
adding it to the observed reading
B
multiplying it by the reading
C
ignoring it
D
subtracting it from the observed reading
19

The least count of a Micrometer Screw Gauge with 50 divisions on its circular scale is?

A
0.1 mm
B
0.05 mm
C
0.01 mm
D
1 mm
20

The pitch of a standard Micrometer Screw Gauge is?

A
1 mm
B
0.5 mm
C
0.1 mm
D
0.01 mm
21

What part of a Micrometer Screw Gauge prevents over-tightening?

A
spindle
B
sleeve
C
thimble
D
ratchet
22

If the zero of the circular scale is below the horizontal line when the screw gauge is closed, the zero error is?

A
positive
B
negative
C
absolute
D
relative
23

Mass is the measure of the quantity of matter, while weight is a?

A
force
B
pressure
C
volume
D
density
24

Which instrument is based on the principle of levers?

A
Spring Balance
B
Digital Balance
C
Physical Balance
D
Stopwatch
25

A mechanical stopwatch can measure time up to an accuracy of?

A
1/10th of a second
B
1/100th of a second
C
1 second
D
1/1000th of a second
26

An electronic/digital stopwatch can measure up to?

A
one tenth of a second
B
one thousandth of a second
C
one hundredth of a second
D
one minute
27

In a measuring cylinder, the surface of water curves downward. This surface is called?

A
convex meniscus
B
concave meniscus
C
level surface
D
top edge
28

To measure the volume of an irregularly shaped solid that does not fit in a measuring cylinder, one should use a?

A
physical balance
B
beaker
C
displacement can
D
metre rule
29

Errors that occur due to a definite rule, such as a zero error or poor calibration, are called?

A
human errors
B
random errors
C
parallax errors
D
systematic errors
30

Sudden fluctuations in temperature or pressure during an experiment can cause what type of error?

A
systematic error
B
human error
C
random error
D
zero error
31

How can the effect of random errors be reduced?

A
by using a different instrument
B
by taking a single, careful reading
C
by taking multiple readings and averaging them
D
by correcting for zero error
32

The uncertainty in a measurement made with a metre rule calibrated in millimeters is?

A
± 0.1 cm
B
± 1 mm
C
± 0.05 cm
D
± 0.5 mm
33

The accurately known digits and the first doubtful digit in a measurement are known as?

A
base units
B
prefixes
C
significant figures
D
derived units
34

How many significant figures are in the measurement 5.06 m?

A
1
B
2
C
3
D
4
35

How many significant figures are there in 0.0034 m?

A
5
B
4
C
3
D
2
36

In scientific notation, such as 3.50 x 10^4 m, how many significant figures are there?

A
2
B
3
C
4
D
5
37

Precision of a measurement refers to?

A
how close the measurement is to the true value
B
the number of significant figures
C
how close a group of measurements are to each other
D
the smallest division on the instrument
38

Accuracy of a measurement is related to?

A
how close the measured value is to the true value
B
the consistency of repeated measurements
C
the least count of the instrument
D
the number of decimal places
39

A more precise instrument has a?

A
larger least count
B
smaller least count
C
higher number of errors
D
simpler scale
40

Which timing device is the most precise for measuring very short intervals like 10^-10 seconds?

A
Digital stopwatch
B
Analogue stopwatch
C
Atomic clock
D
Ticker-tape timer
41

When rounding off 2.512 to two significant figures, the result is?

A
2.5
B
2.6
C
2.51
D
3.0
42

The unit of a light year is used to measure?

A
time
B
speed of light
C
distance
D
brightness
43

A displacement can is used to measure the?

A
mass of a liquid
B
volume of a solid
C
density of a solid
D
mass of a solid
44

Four students measure the diameter of a cylinder and get 3.475 cm. The instrument used likely has a least count of?

A
0.1 cm
B
0.01 cm
C
0.001 cm
D
1 cm
45

Which of the following errors can be reduced by using automated instruments?

A
Systematic Errors
B
Random Errors
C
Zero Errors
D
Human Errors
46

The SI unit for intensity of light is?

A
Lumen
B
Lux
C
Candela
D
Watt
47

The prefix 'femto' is equal to?

A
10^-12
B
10^-9
C
10^-18
D
10^-15
48

Which instrument is most suitable for measuring the thickness of a single sheet of paper?

A
Metre rule
B
Measuring tape
C
Vernier Callipers
D
Micrometer Screw Gauge
49

The number 2000 µs can be written as?

A
2 s
B
2 ms
C
0.2 s
D
0.02 s
50

The reading for the volume of a liquid in a measuring cylinder should be taken from the?

A
top of the meniscus
B
bottom of the concave meniscus
C
average of top and bottom
D
eye level above the meniscus
51

Which of the following is a vector quantity?

A
Speed
B
Mass
C
Displacement
D
Time
52

The study of motion of objects without referring to forces is known as

A
Dynamics
B
Mechanics
C
Kinematics
D
Relativity
53

If a body does not change its position with respect to its surroundings, it is said to be at

A
Rest
B
Motion
C
Equilibrium
D
Vibration
54

The motion of a body along a straight line is called

A
Circular motion
B
Rotatory motion
C
Vibratory motion
D
Linear motion
55

The motion of a Ferris wheel is an example of

A
Linear motion
B
Random motion
C
Circular motion
D
Vibratory motion
56

A body repeating its to and fro motion about a fixed position is undergoing

A
Translatory motion
B
Rotatory motion
C
Vibratory motion
D
Random motion
57

The shortest distance between the initial and final positions of a motion is called

A
Distance
B
Displacement
C
Path length
D
Speed
58

The SI unit for both distance and displacement is

A
Kilometer
B
Centimeter
C
Metre
D
Inch
59

The distance covered in unit time is known as

A
Velocity
B
Acceleration
C
Speed
D
Displacement
60

If a body moves from point A to B along a curved path, the displacement is the

A
Length of the curved path
B
Average path length
C
Straight line from A to B
D
Initial position A
61

The speed of a vehicle shown by its speedometer at any instant is called

A
Average speed
B
Uniform speed
C
Instantaneous speed
D
Variable speed
62

Average velocity is defined as

A
Total distance / Total time
B
Displacement / Time
C
Change in speed / Time
D
Total path / Time
63

If the speed and direction of a moving body do not change, the velocity is said to be

A
Variable
B
Non-uniform
C
Instantaneous
D
Uniform
64

The time rate of change of velocity is called

A
Speed
B
Displacement
C
Acceleration
D
Force
65

Negative acceleration is also known as

A
Deceleration
B
Uniform acceleration
C
Variable acceleration
D
Centripetal acceleration
66

The SI unit of acceleration is

A
m s⁻¹
B
m s⁻²
C
km h⁻¹
D
cm s⁻²
67

In a distance-time graph, a straight line represents motion with

A
Uniform acceleration
B
Variable speed
C
Uniform speed
D
Deceleration
68

In a distance-time graph, a horizontal line indicates that the object is

A
Accelerating
B
Decelerating
C
Moving with uniform speed
D
At rest
69

The gradient (slope) of a distance-time graph is equal to the

A
Acceleration
B
Displacement
C
Average speed
D
Total distance
70

In a speed-time graph, a line rising upward shows that the speed is

A
Decreasing
B
Constant
C
Increasing
D
Zero
71

What does the gradient of a speed-time graph represent?

A
Distance
B
Speed
C
Displacement
D
Acceleration
72

The area under a speed-time graph is numerically equal to the

A
Acceleration
B
Average speed
C
Distance covered
D
Final velocity
73

For a freely falling body, the initial velocity is taken as

A
10 m s⁻¹
B
9.8 m s⁻¹
C
Zero
D
Maximum
74

What is the approximate value of 'g' (free fall acceleration) used for calculations near Earth?

A
9.8 m s⁻²
B
10 m s⁻²
C
3 x 10⁸ m s⁻¹
D
15 m s⁻²
75

What is the universal speed limit for any object in the universe?

A
3 x 10⁸ m s⁻²
B
10 m s⁻²
C
3 x 10⁸ m s⁻¹
D
9.8 m s⁻¹
76

To add vectors, the rule used is called the

A
Right-hand rule
B
Left-hand rule
C
Head-to-tail rule
D
Screw rule
77

Which branch of mechanics deals with forces and their effect on the motion of objects?

A
Kinematics
B
Statics
C
Dynamics
D
Optics
78

The motion of a bee is an example of what type of motion?

A
Linear
B
Circular
C
Rotatory
D
Random
79

If a car is moving on a circular road with constant speed, its velocity is

A
Constant
B
Zero
C
Changing
D
Uniform
80

According to the text, the fastest land mammal, the cheetah, has a top speed of

A
100 km h⁻¹
B
110 km h⁻¹
C
120 km h⁻¹
D
90 km h⁻¹
81

When a paratrooper falls with uniform velocity, the downward force of gravity is balanced by the

A
Upward thrust
B
Air resistance
C
Frictional force
D
Tension in strings
82

If a car accelerates from rest to 144 km h⁻¹ in 20 seconds, what is the distance covered?

A
400 m
B
50 m
C
1400 m
D
1440 m
83

The numerical ratio of displacement to distance is always

A
less than one
B
equal to one
C
greater than one
D
equal to or less than one
84

If a ball is dropped from a tower, what is the distance it covers in the first second? (Use g = 10 m s⁻²)

A
10 m
B
5 m
C
15 m
D
20 m
85

A horizontal line on a speed-time graph shows that the acceleration of the motion is

A
Positive
B
Negative
C
Constant
D
Zero
86

The direction of gravitational acceleration 'g' is always

A
Upwards
B
Downwards
C
Horizontal
D
Depends on the mass
87

When a body is thrown vertically upward, its final velocity at the highest point is

A
Maximum
B
Negative
C
Zero
D
Equal to initial velocity
88

In graphical analysis, the independent quantity is normally taken along the

A
y-axis
B
x-axis
C
z-axis
D
Origin
89

A vector is represented graphically by a straight line with an

A
Arrow head
B
Dot
C
Circle
D
Cross
90

The magnitude of a vector is represented by the

A
Direction of the line
B
Angle of the line
C
Length of the line
D
Thickness of the line
91

Which of the following is a scalar quantity?

A
Force
B
Velocity
C
Energy
D
Weight
92

The motion of the drum of a washing machine dryer is an example of

A
Translatory motion
B
Rotatory motion
C
Vibratory motion
D
Linear motion
93

To represent the direction of a vector, how many mutually perpendicular lines are required?

A
One
B
Two
C
Three
D
Four
94

The point where the x-axis and y-axis meet is known as the

A
Reference point
B
Origin
C
Midpoint
D
Intersection
95

If the velocity of an object is increasing, we say the object is

A
Decelerating
B
At rest
C
Accelerating
D
Moving uniformly
96

The equation S = vᵢt + ½at² is which equation of motion?

A
First
B
Second
C
Third
D
Fourth
97

If a car travels from Lahore to Multan covering 320 km, this value represents the

A
Displacement
B
Velocity
C
Distance
D
Acceleration
98

When adding vectors, the resultant vector is drawn from the tail of the first vector to the

A
Head of the first vector
B
Tail of the last vector
C
Head of the last vector
D
Origin
99

If an arrow is thrown vertically upward, the value of 'g' is taken as

A
Positive
B
Negative
C
Zero
D
Constant
100

The property of a body to resist a change in its state of rest or motion is called?

A
Momentum
B
Force
C
Inertia
D
Acceleration