Question 1.
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
A. Conduction
B. Convection
C. Radiation
D. Both conduction and convection
Ans: B. Convection
Question 2.
When a bullet is fired from a gun
A. The gun moves forward
B. The gun jumps up
C. The gun does not move
D. The gun recoils with the same momentum as the bullet
Ans: D. The gun recoils with the same momentum as the bullet
Question 3.
When a card placed over a tumbler is flicked with the finger, the coin placed over it falls in the tumbler.
A. Law of conservation of energy
B. Newton’s third law of motion
C. Law of Inertia
D. Law of conservation of momentum
Ans: C. Law of Inertia
Question 4.
Energy travels from Sun to Earth through
A. Conduction
B. Convection
C. Radiation
D. Modulation
Ans: C. Radiation
Question 5.
The inability of a body to change its state of rest or uniform motion along a straight line is called its
A. Momentum
B. Velocity
C. Acceleration
D. Inertia
Ans: D. Inertia
Question 6.
According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the __ of an object.
A. Density
B. Volume
C. Force
D. Mass
Ans: D. Mass
Question 7.
Which best describes how air moves during convection?
A. Cool air falls down
B. Warm air falls down
C. Cool air is replaced by warm air
D. Air always falls down
Ans: A. Cool air falls down
Question 8.
The moment of inertia of a body does not depend upon its
A. Axis of rotation
B. Angular velocity
C. Form of mass
D. Distribution of mass
Ans: B. Angular velocity
Question 9.
Why does a cannon recoil after firing ?
A. Conservation of energy
B. Backward thrust of gases produced
C. Newton’s third law of motion
D. Newton’s first law of motion
Ans: C. Newton’s third law of motion
Question 10.
When does land breeze occur?
A. Fall
B. Winter
C. Both A & B
D. Hot summer
Ans: C. Both A & B
Question 11.
An athlete runs before long jump to get advantage on
A. Inertia of motion
B. Frictional force
C. Moment of a force
D. Principle of moments
Ans: A. Inertia of motion
Question 12.
When a constant force acts on an object with a mass of 8 kg for a duration of 3 s. it increases the object’s velocity from 4 m/s to 6 m/s . What is the magnitude of the applied force?
A. 5.33 N
B. 4.33 N
C. 6.33 N
D. 3.33 N
Ans: A. 5.33 N
Question 13.
The cooling by a desert Cooler is based on:
A. Hot air replacement
B. Air dehydration
C. Evaporative Cooling
D.Air Rehydration
Ans: C. Evaporative Cooling
Question 14.
What is the gravity of moon as compared to the Earth
A. 1/4 th of Earth
B. 1/5 th of Earth
C. 1/6 th of Earth
D. 1/8 th of Earth
Ans: C. 1/6 th of Earth
Question 15.
A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
A. 40
B. 10
C. 20
D. 80
Ans: B. 10
Physics GK MCQs all set
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