Physics set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 448 questions
Q.151 When a bus suddenly starts, the passengers are pushed backwards. This is an example of:
A newtons first law
B newtons second law
C newtons third law
D law of conservation of momentum
Discuss / Board
Q.152 A ball is dropped from a satellite revolving around the earth. The ball will:
A fall to the earth immediately
B continue to move with the same speed along the original orbit
C fly off tangentially
D move towards the moon
Discuss / Board
Q.153 The apparent weight of a person in a lift moving downwards with acceleration g is:
A zero
B mg
C 2mg
D infinity
Discuss / Board
Q.154 Rocket propulsion is based on the principle of:
A conservation of mass
B conservation of energy
C conservation of linear momentum
D conservation of angular momentum
Discuss / Board
Q.155 A body of mass M collides against a wall with velocity V and rebounds with same speed. Change in momentum is:
A zero
B mv
C mv/2
D 2mv
Discuss / Board
Q.156 The work done by a centripetal force is:
A zero
B positive
C negative
D infinite
Discuss / Board
Q.157 If the momentum of a body is doubled, its kinetic energy becomes:
A half
B double
C three times
D four times
Discuss / Board
Q.158 A wound watch spring possesses:
A kinetic energy
B potential energy
C electrical energy
D thermal energy
Discuss / Board
Q.159 The power of a water pump is 2 kw. If g=10, the amount of water it can raise in 1 min to a height of 10m is:
A 1000 liters
B 2000 liters
C 1200 liters
D 2400 liters
Discuss / Board
Q.160 In an elastic collision, which of the following remains constant?
A kinetic energy only
B momentum only
C both momentum and kinetic energy
D neither momentum nor kinetic energy
Discuss / Board
Q.161 A light and a heavy body have equal kinetic energy. Which has greater momentum?
A light body
B heavy body
C both have equal momentum
D depends on velocity alone
Discuss / Board
Q.162 Kilowatt-hour is the unit of:
A power
B force
C momentum
D energy
Discuss / Board
Q.163 The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy?
A no it converts to kinetic energy
B yes it violates the law
C no it dissipates as heat only
D yes energy is lost to gravity
Discuss / Board
Q.164 Work done by a constant force is a:
A scalar quantity
B vector quantity
C tensor quantity
D dimensionless quantity
Discuss / Board
Q.165 The value of g at the center of the earth is:
A maximum
B minimum but not zero
C same as surface
D zero
Discuss / Board
Q.166 Escape velocity from earths surface depends on mass of the body as:
A m square
B m
C m power zero
D inverse of m
Discuss / Board
Q.167 Time period of a geostationary satellite is:
A 12 hours
B 24 hours
C 36 hours
D 48 hours
Discuss / Board
Q.168 If earth shrinks to half its radius without changing its mass, the duration of the day will be:
A 6 hours
B 12 hours
C 24 hours
D 48 hours
Discuss / Board
Q.169 Weight of a body is maximum at:
A poles
B equator
C center of earth
D at altitude
Discuss / Board
Q.170 The ratio of escape velocity to orbital velocity near the earth is:
A 2
B 1.5
C root 2
D root 3
Discuss / Board
Q.171 Gravitational force is a:
A conservative force
B non-conservative force
C frictional force
D repulsive force
Discuss / Board
Q.172 If the distance between two masses is doubled, the gravitational force between them becomes:
A half
B double
C four times
D one-fourth
Discuss / Board
Q.173 Acceleration due to gravity decreases with:
A altitude only
B depth only
C both altitude and depth
D neither altitude nor depth
Discuss / Board
Q.174 Density of water is maximum at:
A 0 c
B 100 c
C 4 c
D -4 c
Discuss / Board
Q.175 First law of thermodynamics is a consequence of conservation of:
A energy
B mass
C momentum
D charge
Discuss / Board
Q.176 In an isothermal process, the internal energy of an ideal gas:
A increases
B remains constant
C decreases
D becomes zero
Discuss / Board
Q.177 The mode of heat transfer that does not require a medium is:
A conduction
B convection
C radiation
D induction
Discuss / Board
Q.178 Which color of a hot body indicates the highest temperature?
A red
B yellow
C white
D blue
Discuss / Board
Q.179 At absolute zero, a gas has:
A infinite volume
B maximum kinetic energy
C zero volume and zero kinetic energy theoretically
D constant pressure
Discuss / Board
Q.180 A black body is defined as one which:
A absorbs all radiations incident upon it
B reflects all radiations
C transmits all radiations
D absorbs only black light
Discuss / Board

Master Physics set 1 for All Competitive Exams 2026

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