Physics Fundamentals Practice Questions
16 free Physics Fundamentals practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
What is the SI unit of force?
- A Joule
- B Newton
- C Watt
- D Pascal
Correct answer: Newton
The SI unit of force is the Newton. It is defined as the force required to accelerate a mass of 1 kg by 1 m/s².
Which law states that every action has an equal and opposite reaction?
- A Newton's First Law
- B Newton's Second Law
- C Newton's Third Law
- D Law of Gravitation
Correct answer: Newton's Third Law
Newton's Third Law states that for every action, there is an equal and opposite reaction. This explains interactions between objects.
What is the unit of energy?
- A Watt
- B Joule
- C Newton
- D Ampere
Correct answer: Joule
The SI unit of energy is the Joule. It measures the capacity to do work.
What is the acceleration due to gravity on Earth approximately?
- A 9.8 m/s²
- B 10 m/s
- C 8.9 m/s²
- D 9.8 m/s
Correct answer: 9.8 m/s²
The acceleration due to gravity on Earth is approximately 9.8 m/s². It affects all objects equally regardless of mass.
Which form of energy is stored in an object due to its position?
- A Kinetic energy
- B Thermal energy
- C Potential energy
- D Electrical energy
Correct answer: Potential energy
Potential energy is stored energy based on position or configuration. For example, a raised object has gravitational potential energy.
What is the SI unit of power?
- A Joule
- B Watt
- C Newton
- D Volt
Correct answer: Watt
The SI unit of power is the Watt. It measures the rate of doing work or energy transfer.
Which type of energy is associated with motion?
- A Potential energy
- B Kinetic energy
- C Chemical energy
- D Nuclear energy
Correct answer: Kinetic energy
Kinetic energy is the energy of motion. It depends on the mass and velocity of an object.
Which instrument is used to measure temperature?
- A Barometer
- B Hygrometer
- C Galvanometer
- D Thermometer
Correct answer: Thermometer
A thermometer measures temperature. It can be calibrated in Celsius, Fahrenheit, or Kelvin.
Which law relates force, mass, and acceleration?
- A Newton's First Law
- B Newton's Third Law
- C Archimedes' Principle
- D Newton's Second Law
Correct answer: Newton's Second Law
Newton's Second Law states that force equals mass times acceleration (F = ma). It explains how objects accelerate under force.
Which wave requires a medium to travel?
- A Light wave
- B Radio wave
- C Sound wave
- D Microwave
Correct answer: Sound wave
Sound waves require a medium like air or water to propagate. They cannot travel through a vacuum.
What is the speed of light in vacuum 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
Correct answer: 3 × 10^8 m/s
The speed of light in vacuum is approximately 3 × 10^8 meters per second. It is the fastest known speed in the universe.
Which type of lens is used to correct myopia?
- A Convex lens
- B Cylindrical lens
- C Plane lens
- D Concave lens
Correct answer: Concave lens
A concave lens is used to correct myopia (short-sightedness). It diverges light rays before they reach the eye.
Which force keeps planets in orbit around the Sun?
- A Gravitational force
- B Magnetic force
- C Frictional force
- D Electrostatic force
Correct answer: Gravitational force
Gravitational force keeps planets in orbit around the Sun. It is an attractive force between masses.
Which device converts electrical energy into mechanical energy?
- A Motor
- B Generator
- C Transformer
- D Bulb
Correct answer: Motor
An electric motor converts electrical energy into mechanical energy. It is widely used in appliances and machines.
What is the SI unit of resistance?
- A Ampere
- B Volt
- C Ohm
- D Watt
Correct answer: Ohm
The SI unit of electrical resistance is the Ohm. It measures opposition to the flow of current.
Which phenomenon explains why objects float in water?
- A Buoyancy
- B Gravity
- C Friction
- D Inertia
Correct answer: Buoyancy
Buoyancy is the upward force exerted by a fluid on an object. It allows objects less dense than the fluid to float.