## Thursday, February 27, 2020 # Physics quiz For UPSC | SSC | Rail | RRB | State PSC | class 10 icse P27

Page 27

80050261. Newton's first law of motion gives the concept of
A
energy
B
work
C
momentum
D
inertia
D
80047262. Longitudinal waves cannot travel through
A
Vacuum
B
Solid
C
Liquid
D
Gas
A
80130263. Which of the following is used for regulated electric supply?
A
Zener diode
B
Junction diode
C
Gun diode
D
Tunnel diode
A
80007264. A gas thermometer is more sensitive than a liquid thermometer because a gas:
A
is lighter than liquid
B
expands more than a liquid
C
is easy to obtain
D
does not change state easily
D
Correct Answer: D. does not change state easily
80008265. A hydrogen balloon floats up because of
A
air pressure decreases with a decrease in height
B
air pressure decreases with decrease in weight
C
weight of the balloon is less than the weight of air displaced by it.
D
the pressure, inside the balloon is more than the pressure outside it
C
Correct Answer: C. weight of the balloon is less than the weight of air displaced by it.
80062266. Surface tension in a liquid is due to
A
B
Cohesive force between molecules
C
Gravitational force between molecules
D
Electrical force between molecules
B
Correct Answer: B. Cohesive force between molecules
80118267. When the speed of the car is doubled, then what will be the braking force of the car to stop it in the same distance
A
four times
B
two times
C
half
D
one-fourth
A
80077268. The instrument used to measure the force and velocity of the wind is
A
Ammeter
B
Anemometer
C
Altimeter
D
Audiometer
B
80148269. Why are we able to hear short wave broadcasts better than longwave broadcasts?
A
Short waves are more energetic than long waves.
B
Short waves are unaffected by atmospheric disturbances.
C
D
By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
A
Correct Answer: A. Short waves are more energetic than long waves.
80124270. Which combination of colors are the most convenient during day and night time
A
Orange and blue
B
White and black
C
Yellow and blue
D
Red and green
D
Correct Answer: D. Red and green