# Solved MCQs Of Physics Class 10 with Answers | Chapter Wise

In this section of Physics MCQs, you will find Solved MCQs of Physics Class 10 with answers for your board exams, tests, and competitive exams. All these MCQs of Physics will help you in your online test preparation. These are the most important and SLO-based MCQs of Physics. We have collected the most important and repeated Multiple Choice Questions of Physics for Class 10 students. You can easily download all these MCQs with Answers in PDF. Below are the chapter-wise MCQ questions for class 10 Physics.

### CHAPTER 10

We have covered the following chapters of grade 10 physics in our solved MCQs of class 10.

• Sound MCQs
• Geometric Optics MCQs
• Electrostatics MCQs
• Current Electricity MCQs
• Electromagnetism MCQs
• Introductory Electronics MCQs
• Information and Communication Technology MCQs

## Chapter 1

1: The mathematical form of simple harmonic motion is______.

• a) a∝ x
• b) a∝-x
• c) a∝x-1
• d) a∝ x²

b) a∝-x

2: The unit of spring constant (K) is:

• a) N/m
• b) Nm
• c) Nm²
• d) None of above

a) N/m

3: A wave transports_________.

• a) Energy
• b) Matter
• c) Both a and b
• d) Air

a) Energy

4: The bending of waves around the edges of the obstacle is:

• a) Reflection
• b) Refraction
• c) Diffraction
• d) Damping

c) Diffraction

5: Which of the following does not affect the period of the mass-spring system?

• a) mass
• b) spring constant
• c) amplitude
• d) all

c) amplitude

6: An object of mass m oscillates on the end of a spring. To double the period, replace the object with one of the masses:

• a) 2m
• b) m/2
• c) 4m
• d) m/4

c) 4m

7: A car mounted on shock absorbers is like a mass on a spring. If we ignore damping, how will the frequency of oscillations change if passengers are added to the car? the frequency will :

• a) increase
• b) decrease
• c) stay the same
• d) zero

b) decrease

8: If the pendulum completes exactly 12 cycles in 2 min, what is the frequency of the pendulum?

• a) 0.10 Hz
• b) 0.17 Hz
• c) ) 6 Hz
• d) 10 Hz

a) 0.10 Hz

9: A certain pendulum has an iron bob. When the iron bob is replaced with a lead bob of the same size, its time period will:

• a) stay the same
• b) Decrease
• c) Increase
• d) be zero

a) stay the same

10: The sound that has a frequency above ________  is known as ultrasound.

• a) 20kHz
• b) 40kHz
• c) 60kHz
• d) 80kHz

a) 20kHz

## Chapter 2

11: Sound depends on_________.

• a) pitch
• b) loudness
• c) amplitude
• d) All of these

d) All of these

12: The sensation felt by our ears is known as:

• a) Sound
• b) Intensity
• c) Intensity level
• d) Echo

a) Sound

13: The minimum distance for echo to be heard is:

• a) 17.15m
• b) 17m
• c) 16m
• d) 18m

b) 17m

14: The intensity of a sound wave increases by 1000W/m². What is this increase equal to in decibels?

• a) 10
• b) 20
• c) 30
• d) 40

c) 30

15: An echo occurs when a sound wave is:

• a) Absorbed
• b) Transmitted
• c) Reflected
• d) Refracted

c) Reflected

16: Compared with a sound of 60 decibels, a sound of 80 decibels has an intensity times greater.

• a) 10
• b) 100
• c) 1000
• d) 10000

b) 100

17: The loudness of a sound is most closely related to its___________.

• a) frequency
• b) period
• c) wavelength
• d) amplitude

d) amplitude

18: Various instruments sound different even when they play the same note due to differences in:

• a) pitch
• b) loudness
• c) quality
• d) intensity

a) pitch

19: Humans can hear a sound that is:

• a) Less than 20 Hz
• b) Between 20Hz & 20KHz
• c) Greater than 20KHz
• d) None of these

b) Between 20Hz & 20KHz

20: The speed of sound on a warm day when the outdoor temperature is 38C°  is:

• a) 331m/s
• b) 345m/s
• c) 354m/s
• d) 362m/s

c) 354m/s

## Chapter 3

21: Minimum echo distance is reduced in:

• a) Summer
• b) Winter
• c) Spring
• d)  Space

b) Winter

22: Which of the following cannot transmit sound?

• a) Solid
• b) Liquid
• c) Gas
• d) Vacuum

d) Vacuum

23: The bouncing back of light rays from the surface of a certain medium is known as:

• a) Reflection
• b) Refraction
• c) Diffraction
• d) Absorption

a) Reflection

24: First law of reflection is:

• a) <i=<r
• b) <i≠<r
• c) n=sinθ1/sinθ2
• d) n=c/v

a)

25: The reciprocal of focal length of the lens is known as:

• a) Power
• c) Pole
• d) Focal point

a) Power

26: The ratio between size of image and size of object is known as:

• a) Magnification
• b) Momentum
• c) Both a & b
• d) None

a) Magnification

27: If the angle of incidence is 30°  the angle of reflection will be:

• a) 30
• b) 45
• c) 90
• d) 210

a) 30

28: When “r” is the radius of curvature of concave mirror, real diminished image will be formed when the object is at:

• a) d0>r
• b) d0=r
• c) r>d >f
• d) d0=f

a) d0>r

29: The focal length of convex mirror with radius of curvature 10cm is:

• a) +10cm
• b) +5cm
• c) -10cm
• d) -5cm

c) -10cm

30: An object is placed 7cm from a concave mirror whose radius of curvature is 10cm, the image formed will be:

• a) Real and upright
• b) Virtual & upright
• c) Real & inverted
• d) Virtual & inverted

c) Real & inverted

## Chapter 4

31: Which one of the following materials will refract light more?

• a) Water
• b) Glass
• c) Air
• d) Diamond

d) Diamond

32: A convex lens with focal length 8cm has the power of lens:

• a) 2.05D
• b) 4D
• c) 12.5D
• d) 16D

c) 12.5 D

33: If the distance from your eyes lens to the retina is shorter than for  a normal eye, you will struggle to see objects that are:

• a) Nearby
• b) Colorful
• c) Far away
• d) Moving fast

c) Far away

34: Who benefits more from using a magnifying glass, a person whose near point is located at a distance away from the eyes of:

• a) 75cm
• b) 50cm
• c) 35cm
• d) 25cm

d) 25cm

35: The human eye forms the image of an object at its:

• a) Iris
• b) Retina
• c) Pupil
• d) Cornea

b) Retina

36: For free space or air the value of Coulomb, s  constant (k) is:

• a) 9×109Nm2c-2
• b) 9×10-9
• c) 9×108
• d) None of these

a) 9×109Nm2c-2

37: The S I unit of electric field intensity is:

• a) N/C
• b) NC
• c) C
• d) N

a) N/C

38: Electric field intensity is a quantity:

• a) Vector
• b) Scalar
• c) Base
• d) Both a & c

a) Vector

39: S I unit of electric potential is:

• a) Volt
• b) C
• c) J/C
• d) Both a & c

a) Volt

40: The Unit of capacitance is:

• b) C/V
• c) Capacity
• d) Both a & b

## Chapter 5

41: In series combination of capacitors path for the flow of charges is:

• a) 1
• b) 2
• c) 3
• d) 5

a) 1

42: In parallel combination of capacitors, Potential difference remains:

• a) Divided
• b) Undivided
• c) Unknown
• d) None

b) Undivided

43: When combing our hairs, we shift electrons from our hair onto the comb. The charge on our hairs is:

• a) Positive
• b) Negative
• c) Zero
• d) Infinite

a) Positive

44: The unit of charge is:

• b) Coulomb
• c) Volt
• d) Electron Volt

b) Coulomb

45: If the distance between two charged particles is halved, the coulomb force betwee two charged particles becomes:

• a) Half
• b) One quarter
• c) Double
• d) Four times

d) Four times

46: The value of coulomb constant k, depends on:

• a) Value of charges
• b) Material medium
• c) Separation between charges
• d) All of these

b) Material medium

47: An additional capacitor is added to a group of capacitors already connected in series the equivalent capacitance:

• a) Increase
• b) Stay same
• c) Decrease
• d) Goes to zero

c) Decrease

48: A capacitor C has a charge Q, the actual charges on its plates are:

• a) Q, Q
• b) Q,  0
• c) Q, – Q
• d) Q/2 , – Q/2

c) Q,-Q

49: Current electricity is also known as:

• a) Electrodynamics
• b) Dynamics
• c) Kinematics
• d) None of these

a) Electrodynamics

50: The unit of current is:

• a) Ampere
• b) Coulomb
• c) C/S
• d) Both a & c

d) Both a 7 c

## Chapter 6

51: Conventional current is due to the flow of:

• a) Electron
• b) Proton
• c) Neutron
• d) Photon

b) Proton

52: Kilowatt hour is the unit of:

• a) Energy
• b) Work
• c) Time
• d) Power

a) Energy

53: Batteries are rated with unit ampere –hour, it is the unit of:

• a) Charge
• b) Current
• c) Power
• d) Energy

a) Charge

54: When connected to a battery, a light bulb glows brightly, if the battery is reversed and connected to the bulb, the bulb will glow:

• a) Brighter
• b) Dimmer
• c) With the same brightness
• d) Fuse

c) With the same brightness

55: The resistance of wire will decrease by increasing:

• a) Temperature
• b) Length
• c) Diameter
• d) Both a & b

c) Diameter

56: The wire made from which of the following material is a conductor:

• a) Glass
• b) Rubber
• c) Silver
• d) Silk

c) Silver

57: The current which reverses direction after regular interval of time is:

• a) DC
• b) AC
• c) Conventional current
• d) Both a & b

b) AC

58: The device that is used to protect a circuit against overload is:

• a) Heater
• b) Fuse
• c) Lamp
• d) All of these

b) Fuse

59: Two resisters of 1 ohm are connected in parallel, the equivalent resistance is:

• a) 2Ω
• b) 1.5 Ω
• c) 1Ω
• d) 0.5Ω

d)  0.5Ω

60:  1KWh=___________
• a) 3600 W
• b) 1000 J
• c) 3.6×106
• d) 0.36 hrs

c) 3.6×106

## Chapter 7

61: A current carrying wire in which current flow in northward direction is deflected towards  the east by a magnetic force. The direction of the magnetic field is:

• a) Straight up
• b) Straight down
• c) South
• d) West

a) Straight up

62: Which derived unit is equivalent to Tesla  T ?

• a) Nm/A
• b) NA/m
• c) N/Am
• d) Am/N

c) N/Am

63: The unit of inductance, the Henry, is equivalent to:

• a) Vs/A
• b) VA/m
• c) As/V
• d) V/A

a) Vs/A

64: When the speed at which a magnet is moved through a coil is increased, the induced voltage?

• a) Increases
• b) Remain the same
• c) Decrease
• d) Goes to 0

a) Increases

65: Slip rings are part of:

• a) DC motor
• b) AC generator
• c) Transformer
• d) Magnet

b) AC generrator

66: A transformer is used for:

• a) Both DC and AC
• b) AC voltage
• c) DC voltages
• d) Farming

b) AC voltage

67: Cathode rays are beam of:

• a) Protons
• b) Electrons
• c) Ions
• d) Neutrons

b) Electrons

68: If the electric field is applied parallel to the direction of electron beam, the electrons will:

• a) Speed up
• b) Slow down
• c) Deflect
• d) Not change its state

b) Slow down

69: If magnetic field is applied parallel to the direction of electron beam, the electrons will:

• a) Speed up
• b) Slow down
• c) Deflect
• d) Not change its state

d) Not change its state

70: The Boolean equation for OR gate is:

• a) X=AB
• b) X= A+B
• c) X=A-B
• d) A/B

b) X=A+B

## Chapter 8

71: What is the number of neutrons in the Plutonium 24292 Pu?

• a) 92
• b) 142
• c) 150
• d) 242

c) 150

72: Which one or more the three decay processes ( α,β,γ)  results in a new element?

• a) Only α
• b) Only β
• c) Only γ
• d) α and β

d) α and β

73: What type of nuclear decay leaves the number of protons and neutrons unchanged?

• a) Alpha decay
• b) Beta decay
• c) Gamma Decay
• d) Both a & b

c) Gamma Decay

74: Radium 226 decays by emitting an alpha particle. What is the daughter nucleus?

• a) Rd
• b) Rn
• c) Bi
• d) Pb

b) Rn

75: Origin of energy from the sun and stars is:

• a) Fission
• b) Fusion
• c) Carbon dating

b) Fusion

76: A sample starts with 1000 radioactive atoms. How many half lives have elapsed when 750 atoms have decayed?

• a) 0.25
• b) 1.5
• c) 2
• d) 2.5

c) 2

77: 39Ar is an isotope with a half life of 269 years. It will reduce to half in:

• a) 134.5min
• b) 134.5 years
• c) 269 min
• d) 269 years

d) 269 years

78: The components of information and communication systems are humans, hardware, software, producers, and_______.

• a) Computers
• b) Fields
• c) Signals
• d) Data/information

d) Data/Information

79: Electric or electromagnetic representations of data or information is termed as:

• a) Computer
• b) Signal
• c) Transmission
• d) Software

b) Signal

## Chapter 9

80: The phenomenon of total internal reflection is used in transmission of signal through__________.

• a) Electric wires
• b) Optical fibers
• c) Electromagnetic waves

b) Optical fibers

81: Electrical conductor or system of conductors used either for radiating electromagnetic energy or for collecting electromagnetic energy is:

• a) Antenna
• b) Satellite
• c) Repeater
• d) Signal

a) Antenna

82: Software that allows users to interact with computer system is:

• a) Hardware
• b) Application
• c) Operating system
• d) Program

c) Operating System

83: Which of the following information storage device has no moving parts to store and retrieve information:

• a) CD /DVD
• b) Hard Drive
• c) Flash Drive
• d) Floppy

b) Hard Drive

84: Telephone communication is the example of transmission of signals through:

• a) Electric wires
• b) Optical fibers
• c) Electromagnetic waves
• d) All

d) All

85: The time period of second pendulum is:

• a) 2s
• b) 1s
• b) 3s
• d) 1.5s

a) 2s

86: If 20 waves passes through the medium in 1s with the speed of 20m/s then the Wavelength is :

• a) 2m
• b) 400m
• c) 20m
• d) 1m

d) 1m

87: Which type of wave is longitudinal?

• a) Light wave
• b) Radio wave
• c) Sound wave
• d) Water wave

c) Sound Wave

88: __________ is commonly refers to electromagnetic radiation.

• a) Light
• b) Sound
• c) Energy
• d) None of these

a) Light

89: A convex lens is of focal length 10cm.Its power is:

• a) 20 diopters
• b) 15 diopters
• c) 50 diopters
• d) 10 diopters

d) 10 diopters

90: The device which stores charge is known as:

• a) Conductor
• b) Electroscope
• c) Insulator
• d) Capacitor

d) Capacitor

## Chapter 10

91: One volt is=

• a) One J/C
• b) One WC
• c) One N/C
• d) W/C

a) One J/C

92: Which of the following represent an ohm?

• a) V/A
• b) J/S
• c) W/A
• d) J/C

a) V/A

93: The rate at which a resistor changes electrical energy to heat can be calculated using relation:

• a) P=IV
• b) P=I²R
• c) P=V²/R
• d) All of them

b) P=I²R

94: Lenz law follows the law of conservation of:

• a) Mass
• b) Charge
• c) Energy
• d) Momentum

c) Energy

95: The frequency of A.C in Pakistan is:

• a) 40 Hz
• b) 50 Hz
• c) 60 Hz
• d) 70 Hz

b) 50 Hz

96: The shape of magnetic lines of forces in case of a straight current carrying conductor is:

• a) Elliptical
• b) Triangular
• c) Rectangular
• d) Circular

d) Circular

97: The process in which electrons are emitted by a hot metal filament is:

• a) Convection
• b) Conduction
• d) Thermionic emission

d) Thermionic emsission

98: Which one is output device :

• a) Keyboard
• b) Monitor
• c) C.P.U
• d) Mouse

b) Moniter

99: The diameter of an atom is:

• a) 10-12cm
• b) 10-16cm
• c) 10-18cm
• d) None of these

d) None

100: The atomic mass number A of an element is equal to:

• a) A+Z
• b) Z+ N
• c)  Z-N
• d) A-N

b) Z+N

### Conclusion:

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