# Physics questions quizlet For UPSC | SSC | Rail | RRB | State PSC P30

Page 30

80063291. The atmosphere is heated mainly by
A
Insolation
B
Conduction
C
D
Convection
C
80135292. Which of the following pairs of physical quantities have the same dimensions?
A
Force and Power
B
Work and Power
C
Work and Energy
D
Momentum and Power
C
Correct Answer: C. Work and Energy
80093293. The type of mirrors used in the headlamp of cars is
A
parabolic concave
B
plane
C
spherical convex
D
cylindrical concave
A
80097294. Tungsten is used for the manufacture of the filament of an electric bulb, because
A
It is a good conductor
B
It is economical
C
It is malleable
D
It has a very high melting point
D
Correct Answer: D. It has a very high melting point
80014295. A pycnometer is an instrument used to measure the
A
density
B
C
intensity of earthquake
D
high temperatures
A
80026296. Dynamo is a device for converting
A
Heat energy into electrical energy
B
Mechanical energy into electrical energy
C
Magnetic energy into electrical energy
D
Chemical energy into electrical energy
B
Correct Answer: B. Mechanical energy into electrical energy
80129297. Which of the following is most elastic?
A
Rubber
B
Wet clay
C
Steel
D
Plastic
C
80079298. The instrument which uses sound waves to measure the depth of oceans is
A
B
Sonar
C
Altimeter
D
Venturimeter
B
80011299. A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens clue to
A
Outward pull on him
B
Inertia of motion
C
Change in momentum
D
Change in acceleration
B
Correct Answer: B. Inertia of motion
80113300. When a ring of metal is heated what happens to its hole?
A
expands
B
contracts
C
it expands or contracts according to its diameter
D
it expands or contracts according to its coefficient of expansion
A