Physics (General Physics science) GK MCQ Questions in English for Competitive Exams. Important MCQs selected from the previous year exam question papers for preparation of upcoming exams.
Physics GK MCQ Questions in English
Q.1: If the velocity of a moving object increases by 1.5 times, its kinetic energy will:
A) Increase by 1.5 times.
B) Increase by 3 times.
C) Increase by 2.25 times.
D) Increase by 6 times.
K = 1/2 mv²
K ∝ v²
When velocity increases by 1.5 times, the kinetic energy will increase by (1.5)² = 2.25 times.
Q.2: Which scale is used to measure the intensity of earthquakes?
A) Richter Scale
B) Metric Scale
C) Centigrade Scale
D) Newton Scale
Q.3: When a bottle of scent is opened in a corner of a room, its fragrance spreads to all parts of the room due to?
A) Evaporation
B) Absorption
C) Diffusion
D) Sublimation
Q.4: When a ray of light passes from one medium to another, its?
A) Wavelength remains constant
B) Frequency remains constant
C) Frequency increases
D) None of these
Q.5: The unit of resistance is?
A) Ampere
B) Coulomb
C) Henry
D) Ohm
Q.6: What is the unit of a light-year?
A) Intensity of light
B) Time
C) Distance
D) Speed of light
Q.7: Who invented the telescope?
A) Galileo
B) Gutenberg
C) Edison
D) Graham Bell
Q.8: What type of mirror is used by a dentist to examine a patient’s teeth?
A) Concave
B) Convex
C) Plane
D) Cylindrical
Q.9: Which of the following is not a unit of heat?
A) Calorie
B) Kilocalorie
C) Kilojoule
D) Watt
Q.10: What is used to correct farsightedness?
A) Concave lens
B) Convex lens
C) Convex mirror
D) Concave mirror
Q.11: Which instrument is used to measure the humidity of the air?
A) Hygrometer
B) Hydrometer
C) Manometer
D) Odometer
Q.12: Why is red color used as an emergency or danger signal?
A) It is an attractive color
B) It has the longest wavelength
C) It is scattered
D) It has the highest energy
Q.13: What is the velocity of the fastest object?
A) Speed of sound
B) Speed of light
C) Speed of an electron
D) Speed of an atom
Explanation: The speed of light is the highest speed, which is 3 × 10^8 meters per second in a vacuum.
Q.14: What is the unit of speed?
A) Newton
B) Watt
C) Meter/second
D) Joule
Explanation: The unit of speed is meter per second (m/s).
Q.15: What is the standard unit of volume?
A) Kilogram
B) Second
C) Liter
D) Meter
Explanation: The standard unit of volume is liter (L).
Q.16: What is the difference between displacement and distance?
A) Displacement is always greater than distance
B) Displacement is a scalar quantity, while distance is a vector quantity
C) Displacement is a vector, while distance is a scalar
D) Both are the same
Explanation: Displacement is a vector quantity as it includes direction, while distance is just a magnitude.
Q.17: Who gave the laws of motion?
A) Newton
B) Galileo
C) Einstein
D) Darwin
Explanation: Newton formulated the three laws of motion.
Q.18: What is Newton’s third law of motion?
A) An object will maintain its state unless acted upon by an external force
B) The direction and magnitude of force are always the same
C) For every action, there is an equal and opposite reaction
D) The magnitude of force is proportional to the mass of an object
Explanation: Newton’s third law states that for every action, there is an equal and opposite reaction.
Q.19: What form of energy is converted in solar panels?
A) Mechanical energy
B) Kinetic energy
C) Electrical energy
D) Thermal energy
Explanation: Solar panels convert the energy from the sun into electrical energy.
Q.20: What does the speed of sound depend on?
A) Air pressure
B) Air temperature
C) Air humidity
D) All of the above
Explanation: The speed of sound depends on air pressure, temperature, and humidity.
Q.21: What causes gravitational force?
A) Mass
B) Friction
C) Reflection
D) Motion
Explanation: Gravitational force arises due to mass.
Q. 22: What is thermal energy related to?
A) Temperature
B) Motion
C) Velocity
D) Force
Explanation: Thermal energy is related to temperature, which is associated with the motion of the molecules of a substance.
Q.23: What is the unit of electric current?
A) Watt
B) Ohm
C) Ampere
D) Volt
Explanation: The unit of electric current is Ampere (A).
Q.24: How is electrical resistance calculated?
A) Ohm’s Law
B) Newton’s Law
C) Galileo’s Law
D) Hooke’s Law
Explanation: Electrical resistance is calculated using Ohm’s Law.
Q.25: In which state is the speed of sound the greatest?
A) Solid
B) Liquid
C) Gas
D) All of the above
Explanation: The speed of sound is greatest in solids because the molecules are closely packed and transmit vibrations faster.
Q.26: What is the unit of magnetic force?
A) Newton
B) Kilogram
C) Tesla
D) Watt
Explanation: The unit of magnetic force is Tesla (T).
Q.27: What travels at the same speed as light?
A) Electron
B) Proton
C) Neutron
D) Photon
Explanation: The speed of a photon is equal to the speed of light, which is 3 × 10^8 meters per second.
Q.28: Who gave the principle of induction?
A) Michael Faraday
B) James Clerk Maxwell
C) Luigi Galvani
D) Albert Einstein
Explanation: The principle of induction was given by Michael Faraday.
Q.29: What is the unit of energy conversion?
A) Joule
B) Watt
C) Volt
D) Meter
Explanation: The unit of energy or work conversion is Joule (J).
Q.30: What does ‘molecular motion’ refer to in physics?
A) Overall motion of particles
B) Intrinsic motion of molecules
C) Mechanical motion of an object
D) Motion of force
Explanation: ‘Molecular motion’ refers to the intrinsic motion of molecules, which depends on temperature.
Q.31: What is the difference between speed and velocity?
A) Speed is only magnitude, while velocity has direction.
B) Speed and velocity are the same.
C) Velocity is only magnitude, while speed has direction.
D) Speed has direction, while velocity is only magnitude.
Explanation: Speed is a scalar quantity that only has magnitude, whereas velocity is a vector quantity that includes direction.
Q.32: What is the unit for measuring mass?
A) Kilogram
B) Meter
C) Joule
D) Watt
Explanation: The unit of mass is the kilogram (kg).
Q.33: What is the unit of speed?
A) Meter/second
B) Kilogram/meter
C) Newton
D) Watt
Explanation: The unit of speed is meter per second (m/s).
Q.34: What is the unit of frequency for sound waves?
A) Hertz
B) Newton
C) Watt
D) Joule
Explanation: The unit of frequency for sound waves is Hertz (Hz).
Q.35: Which property of light is responsible for polarization?
A) Wave nature
B) Particle nature
C) Motion
D) Sound
Explanation: Light can be polarized due to its wave nature.
Q.36: In which state of matter is the speed of sound the greatest?
A) Solid
B) Liquid
C) Gas
D) All of the above
Explanation: The speed of sound is greatest in solids because the molecules are closely packed.
Q.37: What is the definition of gravitational force?
A) The attractive force between two objects
B) The repulsive force between two objects
C) The sustainability of an object
D) The motion of an object
Explanation: Gravitational force is the attractive force between two objects.
Q.38: How many laws are there in thermodynamics?
A) Three
B) Four
C) Two
D) Five
Explanation: There are four main laws in thermodynamics.
Q.39: What is the formula for electric current?
A) Voltage/Resistance
B) Voltage × Resistance
C) Voltage/Current
D) Resistance × Current
Explanation: Electric current (I) = Voltage (V) / Resistance (R).
Q.40: In which field is resonance used?
A) Radio
B) Chemistry
C) Biology
D) Mathematics
Explanation: Resonance is used in radio and other communication devices.
Q. 41: What is the property of vibration known as?
A) Frequency
B) Voltage
C) Resistance
D) Temperature
Explanation: The qualitative measure of vibrations is frequency.
Q.42: What is the fundamental principle of the table theory?
A) The relationship between the frequency of a wave and its speed
B) The relationship between force and motion of an object
C) The relationship between electric current and resistance
D) The relationship between the speed of sound and temperature
Explanation: Table theory shows the relationship between the frequency and speed of a wave.
Q.43: What are the two main types of mechanical energy?
A) Kinetic and Potential
B) Thermal and Electrical
C) Sound and Light
D) Mass and Force
Explanation: Mechanical energy is primarily kinetic (motion) and potential (position).
Q.44: What is the formula for electrical power?
A) Voltage × Current
B) Current × Resistance
C) Voltage / Current
D) Voltage / Resistance
Explanation: Electrical Power (P) = Voltage (V) × Current (I)
Q.45: Traditionally, what type of waves are sound waves?
A) Three-dimensional
B) Two-dimensional
C) One-dimensional
D) All
Explanation: Traditional sound waves are one-dimensional, meaning they propagate in one direction.
Q.46: What is the mathematical formula for displacement?
A) Final position – Initial position
B) Final position + Initial position
C) Distance × Time
D) Time / Distance
Explanation: Displacement is the difference between the final and initial position.
Q.47: Which type of energy is lost during the cooling process?
A) Mechanical energy
B) Thermal energy
C) Electrical energy
D) Chemical energy
Explanation: In the cooling process, thermal energy is lost.
Q.48: What determines the direction of displacement?
A) Direction of motion
B) Direction of force
C) Initial and final position
D) All
Explanation: The direction of displacement depends on the initial and final position.
Q.49: Which law of thermodynamics states the principle of energy conservation?
A) First law
B) Second law
C) Third law
D) Fourth law
Explanation: The first law of thermodynamics is the law of energy conservation, which states that energy cannot be created or destroyed.
Question 50: Who proposed the theory of emission?
A) Herschel
B) Planck
C) Henry
D) Newton
Explanation: The theory of emission was proposed by Planck.
Q.51: What happens when force is applied in the direction of motion?
A) Speed increases
B) Speed decreases
C) Speed remains constant
D) No effect
Explanation: Applying force in the direction of motion increases the speed of the object.
Q.52: What is the definition of electrical resistance?
A) The ability to resist current
B) The ability to conduct current
C) Voltage capacity
D) Energy capacity
Explanation: Electrical resistance measures the ability to resist current.
Q.53: At what frequency do sound waves have the most energy?
A) High frequency
B) Low frequency
C) Medium frequency
D) All the same
Explanation: Sound waves have the most energy at high frequencies.
Q.54: Which law of Newton is used to calculate motion?
A) First law
B) Second law
C) Third law
D) All
Explanation: Newton’s second law is used to calculate motion.
Q.55: Which law describes the relationship between mass and force?
A) Newton’s first law
B) Newton’s second law
C) Newton’s third law
D) Newton’s fourth law
Explanation: Newton’s second law describes the relationship between mass and force.
Q.56: What is involved in the maximum displacement of an object?
A) Work
B) Force
C) Energy
D) Speed
Explanation: The maximum displacement of an object involves energy.
Q.57: What does the speed of sound not depend on?
A) Type of medium
B) Temperature
C) Frequency of sound
D) Amplitude of sound
Explanation: The speed of sound does not depend on the amplitude of sound, but it depends on the type of medium and temperature.
Q.58: What is the Table Theory related to?
A) Properties of waves
B) Properties of sound
C) Properties of electricity
D) Properties of light
Explanation: The Table Theory is related to the properties and behavior of waves.
Q.59: What type of laws are the laws of motion?
A) Static
B) Diffraction
C) Mechanical
D) Electrical
Explanation: The laws of motion are mechanical.
Q.60: What is the unit of sound intensity?
A) Decibel
B) Hertz
C) Watt
D) Joule
Explanation: The unit of sound intensity is Decibel (dB).
Q.61: What type of energy is electricity?
A) Thermal
B) Mechanical
C) Chemical
D) Electrical
Explanation: The energy of electricity is in the form of electrical energy.