Hello Guys, welcome to this physics part one page! First of all. I am going to provide you World Physics General Knowledge Questions Answers Part - 1, which contains 100 gk questions with their answers. I hope it will be useful for you. Now I am going to show you that what physics is:
What is physics?
Let's see the physics definition. Physics is a natural science that deals with the study of matter and energy and the interactions between them. It seeks to explain and predict the behavior of physical systems, from the smallest subatomic particles to the largest structures in the universe. Physics encompasses a wide range of concepts, including mechanics, thermodynamics, electromagnetism, quantum mechanics, and cosmology, and its principles are used to explain a wide variety of phenomena in the natural world, as well as to design and develop new technologies. Physics is an essential part of our understanding of the world and plays a critical role in shaping our modern technological society.
Physics General Knowledge Questions Answers Part - 1
Q001) A ball falls from a height of 20 m and then bounces back up to a height of 10 m. The loss of energy is:
A) 5%
B) 25%
C) 50%
D) 75%
Answer: C
Q002) When the sound moves, it carries _________ with it:
A) Mass
B) Energy
C) Potential Difference
D) None of These
Answer: B
Q003) If a person stands on a sensitive scale and takes a deep breath, then the scale’s reading will:
A) Increase
B) Decrease
C) No Effect on the Reading
D) None of These
Answer: B
Q004) The focus distance of a convex lens is 0.25 cm. Its capacity will be:
A) 2D
B) -2D
C) 4D
D) -4D
Answer: C
Q005) What is the physical state of water at 12°C:
A) Liquid
B) Solid
C) Ionic
D) None of These
Answer: A
Q006) In which of the following medium the speed of sound will be maximum at a temperature of about 20°C:
A) Air
B) Granite
C) Water
D) Iron
Answer: D
Q007) Sound is produced by ___________:
A) Vibrating Objects
B) Moving Objects
C) Talking Phone
D) Swinging Bodies
Answer: A
Q008) Secondary cells are those, which _____________:
A) Can’t be Recharged
B) Can be Recharged
C) Can be Used Only Once
D) Both B and C
Answer: B
Q009) What is the lowest freezing point of mercury:
A) 0°C
B) -4°C
C) -39°C
D) -69°C
Answer: C
Q010) When pressure is increased in a gas cylinder, its mass will ___________:
A) Increase
B) Decrease
C) Both A and B
D) Remain Unchanged
Answer: D
Q011) Angstrom is a unit of expressing ________:
A) Time
B) Mass
C) Length
D) Force
Answer: C
Q012) If a bulb of 100 W is burnt for 5 hours daily, then how much will it cost in 30 days at the rate of 50 paise per unit:
A) 7.50
B) 9.50
C) 11.50
D) 13.50
Answer: A
Q013) Photovoltaic cells are:
A) Solar Cell
B) Thermal Cell
C) Sulphur Cell
D) Molar Cell
Answer: A
Q014) What portion of the iceberg is above the surface of the sea while floating in the sea:
A) 1/4
B) 1/6
C) 1/9
D) 1/10
Answer: D
Q015) __________×__________= Force:
A) Mas and Velocity
B) Mass and Acceleration
C) Weight and Velocity
D) Weight and Heat
Answer: B
Q016) The weight of an object falling freely under the gravity is __________:
A) Maximum
B) Minimum
C) Constant
D) Variable
Answer: C
Q017) If a toy car of 300 gm runs at a speed of 10 m/s, then the momentum will be:
A) 3 Kg.m/s
B) 5 Kg.m/s
C) 14 Kg.m/s
D) 29 Kg.m/s
Answer: A
Q018) Which of the following places has the highest value of g:
A) Mt. Everest
B) The Equator
C) Somewhere in Antarctica
D) None of These
Answer: C
Q019) Which of the following radiation types has the most energy:
A) Visible Rays
B) Ultraviolet
C) X-rays
D) None of These
Answer: C
Q020) The pressure inside a soap bubble is:
A) Higher than the Atmospheric Pressure
B) Less than the Atmospheric Pressure
C) Equal Atmospheric Pressure
D) Half of the Atmospheric Pressure
Answer: A
Q021) __________ is an aperture which controls light passage in the eye:
A) Sclerotic Coat
B) Pupil
C) Iris
D) Blind Spot
Answer: C
Q022) Rad/sec is the unit of:
A) Angular Displacement
B) Angular Velocity
C) Angular Acceleration
D) None of These
Answer: B
Q023) 1 Micron is equal to:
A) 100 mm
B) 1000 mm
C) 0.01 mm
D) 0.001 mm
Answer: C
Q024) Which of the following is an auxiliary unit:
A) Radian
B) Steradian
C) Ampere
D) Both A and B
Answer: D
Q025) _____ is used to examine the internal parts of our body:
A) Microscope
B) Periscope
C) Odometer
D) Endoscope
Answer: D
Q026) Which instrument is used to measure the height or elevation:
A) Micrometre
B) Telemeter
C) Hypsometer
D) Tonometer
Answer: C
Q027) To measure the strength of direct current _____ is used:
A) Tachometer
B) Spectrometer
C) Voltmeter
D) Tangent Galvanometer
Answer: D
Q028) Find out the true statements regarding thermal conductivity:
A) Steel>Wood>Water
B) Steel>Water>Plastic
C) Water>Wood>Steel
D) Water>Steel>Plastic
Answer: B
Q029) As the temperature increases, the thermal conductivity of the solid metal ______:
A) Increases
B) Decreases
C) Remains Same
D) None of These
Answer: B
Q030) _____ is the external energy applied on a body to change its state of rest or uniform motion:
A) Force
B) Pressure
C) Buoyancy
D) Impulse
Answer: A
Q031) If a car is running at a speed of 72 km/hr and stops after 45 seconds, then what will be the retardation:
A) 0.3 m/s²
B) 0.25 m/s²
C) 0.44 m/s²
D) 3 m/s²
Answer: C
Q032) Surface tension depends on:
A) Atmospheric Pressure
B) Nature of the Liquid
C) Temperature of the Liquid
D) All of These
Answer: D
Q033) The matric system is also called:
A) CGS
B) MKS System
C) SI
D) None of These
Answer: B
Q034) Plane angle and solid angle are:
A) Fundamental Quantity
B) Derived Quantity
C) Supplementary Quantity
D) None oy These
Answer: C
Q035) Which one of the following is not a secondary pigment:
A) Green
B) Red
C) Blue
D) Yellow
Answer: D
Q036) When you look at a mirror, the image you see in the mirror is a __________ image:
A) Virtual
B) Real
C) Reflected
D) Plain
Answer: A
Q037) What type of spectrum is the rainbow:
A) Natural Spectrum
B) Artificial Spectrum
C) Both A and B
D) None of These
Answer: A
Q038) Which of the following has no units:
A) Thermal Capacity
B) Magnetic Susceptibility
C) Angular Acceleration
D) None of These
Answer: B
Q039) The primary cause of motion is:
A) Velocity
B) Acceleration
C) Force
D) Energy
Answer: C
Q040) Gravitational mass is a _______ quantity:
A) Vector
B) Scalar
C) Tensor quantity
D) None of the above
Answer: A
Q041) The momentum of a body depends:
A) Only on its Velocity
B) Only on its Mass
C) Both A and B
D) None of the Above
Answer: CQ042) Solar energy __________ generates more power than wind energy:
A) Sometimes
B) Always
C) Never
D) Often
Answer: A
Q043) Plasma is formed in stars due to _________:
A) High Temperature
B) High Pressure
C) Low Temperature
D) None of These
Answer: A
Q044) _________ waves include visible light waves, X-rays, gama rays, radio waves, microwaves, ultraviolet and infrared waves:
A) Mechanical
B) Magnetic
C) Electromagnetic
D) Electric
Answer: C
Q045) Which of the following is not a characteristic of sound waves:
A) Velocity
B) Nature
C) Wavelength
D) None of These
Answer: B
Q046) Echocardiogram is used in __________:
A) Bioelectricity
B) Radiation
C) X-rays
D) None of These
Answer: B
Q047) Which of the following lamp has the highest energy efficiency:
A) LED
B) CFL
C) Arc Lamp
D) None of These
Answer: A
Q048) The minimum speed required by a spacecraft to escape the gravitational pull is ________:
A) 6 Miles/sec
B) 7 Km/sec
C) 7 Miles/sec
D) 10 Miles/sec
Answer: C
Q049) Acceleration due to gravity (g)= ___________:
A) G/MR²
B) GR²/M
C) GM/R²
D) GM/R
Answer: C
Q050) Mechanical energy is equal to:
A) Kinetic + Chemical Energy
B) Kinetic + Potential Energy
C) Kinetic + Heat Energy
D) Kinetic + Electrical Energy
Answer: B
Q051) If a plane travels a distance of 4000 M with the work done of 2000 J, then the force applied is:
A) 5 N
B) 10 N
C) 25 N
D) 50 N
Answer: A
Q052) Heat can be transferred by convection in _________:
A) Solid and Liquid
B) Solid and Vaccum
C) Vaccum and Gas
D) Gas and Liquid
Answer: D
Q053) Changing the amount of the matter _________ will remain unchanged:
A) Volume
B) Mass
C) Density
D) Weight
Answer: C
Q054) If the distance between two masses is reduced to half, then how many times the gravitational force increases between them:
A) 4 Times
B) 5 Times
C) 6 Times
D) 7 Times
Answer: A
Q055) A body absorbs most of the heat when it is:
A) Black and Raugh
B) Black and Smooth
C) White and Raugh
D) White and Smooth
Answer: A
Q056) The Endoscope is based on the principle of:
A) Scattering
B) Total Internal Reflection
C) Both A and B
D) None of These
Answer: B
Q057) Mesons are found in _________:
A) Cosmic Rays
B) Gama Rays
C) X-rays
D) Leaser Beam
Answer: A
Q058) Which of these parts of the ear response to sound waves like a microphone’s diaphragm:
A) Pinna
B) Lobe
C) Fluid in the Inner Ear
D) Eardrum
Answer: D
Q059) Which of the following is generally used to reduce reverberation in an auditorium as sound absorbents:
A) Compressed Fibreboard
B) Rough Plaster
C) Draperies
D) All of These
Answer: D
Q060) How many colours does sunlight consist of:
A) Two
B) Three
C) Five
D) Seven
Answer: D
Q061) The presence of free ___________ in a substance makes it a conductor of electricity:A) Positrons
B) Protons
C) Electrons
D) Neutrons
Answer: C
Q062) During fog we cannot see because of:
A) Reflection
B) Internal Reflection
C) Refraction
D) Scattered Light
Answer: D
Q063) ___________ determines the speed of sound in a medium:
A) Tone of the Wave
B) Time of the Wave
C) Properties of the Medium
D) Amplitude of the Wave
Answer: C
Q064) When the angle between the force and the displacement is 90, the work done is __________:
A) Neutral
B) Negative
C) Zero
D) Positive
Answer: C
Q065) ________ is the change in velocity per unit time:
A) Acceleration
B) Momentum
C) Force
D) Inertia
Answer: A
Q066) When speed of an object exceeds the velocity of sound, then it is said to be moving with ______ speed:
A) Subsonic Speed
B) Supersonic Speed
C) Ultrasonic Speed
D) None of These
Answer: B
Q067) Ultrasound is used to detect ________ in metal blocks:
A) Metal heat
B) Cracks and Flaws
C) Metal Opacity
D) Metal Heaviness
Answer: B
Q068) Water exists as _______ in its solid state:
A) Ice
B) Clouds
C) Foam
D) Steam
Answer: A
Q069) 18 Volts= ________ × 3 Ohms:
A) 6 Amperes
B) 6 Watts
C) 6 Milliamperes
D) 6 Joules
Answer: A
Q070) The velocity of a particle located at the centre of a pipeline will be:
A) Maximum
B) Minimum
C) Zero
D) None of These
Answer: A
Q071) The incident angle for a beam going through the centre of curvature of a concave mirror will be:
A) 0°
B) 60°
C) 90°
D) 180°
Answer: A
Q072) At what point does the Fahrenheit temperature double:
A) -6.7°C
B) -12°C
C) 118°C
D) 160°C
Answer: D
Q073) A convex lens has a focal length of 20cm. Its power in dioptre is:
A) 2
B) 5
C) -7
D) -9
Answer: B
Q074) Light enters eye through a transparent membrane known as __________:
A) Cornea
B) Pupil
C) Retina
D) None of These
Answer: A
Q075) If the force of 3N is applied to a 50 kg object, then what will be the velocity of the object after 4 sec:
A) 0.24 m/s
B) 0.36 m/s
C) 0.68 m/s
D) 1.03 m/s
Answer: AQ076) __________ waves are also known as heat waves:
A) X-rays
B) Gamma Rays
C) Light Waves
D) Infrared Waves
Answer: D
Q077) The English physicist James P. Joule outlined the basis of the _________:
A) Principle of Conversation
B) Phenomenon of Gravitation
C) Theory of Vibrating Receptacle
D) None of These
Answer: A
Q078) A source produces ten crests and ten troughs in 0.1 sec. What is the frequency of the wave produced:
A) 100Hz
B) 108Hz
C) 118Hz
D) 140Hz
Answer: A
Q079) Weber per second is equivalent to _________:
A) Coulomb
B) Volt
C) Ohm
D) Ampere
Answer: B
Q080) 30°C is equal to ________ Kelvin (Approximately):
A) -30
B) 130
C) -243
D) 300
Answer: C
Q081) MHO is the unit of _________ of a substance:
A) Conductance
B) Resistivity
C) Conductivity
D) None of These
Answer: AQ082) Electric wires are generally coated with:
A) Polypropylene
B) Polyvinyl Chloride
C) Polyurethane
D) Polyethylene
Answer: B
Q083) In which of the following medium sound will travel with greater speed at 0°C:
A) Water
B) Hydrogen
C) Aluminium
D) All of These
Answer: C
Q084) The length of a person is 6 feet. The minimum height of a vertical mirror to see the full image in the mirror is:
A) 2 feet
B) 3 feet
C) 4 feet
D) None of These
Answer: B
Q085) Due to the ____________ we see the sun a few minutes before the actual sunrise:
A) Scattering of Light
B) Diffraction of Light
C) Refraction of Light
D) Both A and C
Answer: C
Q086) The pendulum clock can be run at high speed in _______:
A) Summer
B) Winter
C) Spring
D) Rainy Season
Answer: B
Q087) How much work is done to carry a 2-coulomb charge between two points, which has a potential difference of 5 volts:
A) 0.4 Joule
B) 2.5 Joule
C) 10 Joule
D) 20 Joule
Answer: C
Q088) Identify the odd colour from the following:
A) Green
B) Brown
C) Red
D) Yellow
Answer: B
Q089) Kepler’s first law is known as the law of _________:
A) Ellipse
B) Harmonies
C) Motion
D) Equal Area
Answer: A
Q090) ____________ is an example of gravitational potential energy:
A) A Moving Car
B) Bullet Fired from a Gun
C) Dam Water
D) None of These
Answer: C
Q091) The difference in temperature between the two bodies is 30° centigrade. What is the difference in Fahrenheit:
A) 54
B) 64
C) 68
D) 85
Answer: A
Q092) Which Greek letter denotes wavelength:
A) Epsilon
B) Mu
C) Omega
D) Lambda
Answer: D
Q093) The absolute refractive index of air is:
A) 1.03
B) 1.003
C) 1.0003
D) None of These
Answer: C
Q094) What is the standard room temperature on the Kelvin scale:
A) 198K
B) 210K
C) 273K
D) 298K
Answer: D
Q095) Identify the use of the Isotopes in uranium:
A) Fuel in Nuclear Reactor
B) Treatment of Goitre
C) Treatment of Cancer
D) Fuel in Aeroplanes
Answer: A
Q096) The ability to do work is referred to as _________:
A) Pressure
B) Force
C) Energy
D) None of These
Answer: C
Q097) Which of the following principles is involved in all the electric appliances such as electric irons, toasters, electric kettles, hair
dryers etc:
A) Resistance in Circuit
B) Current Passing in Series
C) Heating Effect of Current
D) Generation of Electric Current
Answer: C
Q098) In which of the following two ways can resistance be combined:
A) Series and Parallel
B) Serial and Across
C) Line and Across
D) Straight and Between
Answer: A
Q099) The mass of an atom resides in _________ of the atom:
A) Nucleus
B) Vacant Space
C) Electron Cloud
D) Proton Cloud
Answer: A
Q100) Which of the following is directly proportional to the potential difference:
A) Current
B) Time
C) Resistivity
D) Power
Answer: A
The End