Free Physics01 Practice Test - IAS 

Question 1

Match List I (Energy Conversion) with List II (Device/Process) and select the correct answer from the codes given below the lists. 

A. A -1 B -2 C -3 D -4 E -5
B. A -5 B -3 C -2 D -1 E -4
C. A -2 B -1  C -3  D -5  E -4
D. A -3  B -1  C -2  D -4  E -5

SOLUTION

Solution : B

Option:(b)

Question 2

Which of the following statements about a refrigerator is/are correct?
1.It converts electrical energy into heat energy.
2.It converts electrical energy into mechanical energy.
3.It transfers heat from a high temperature to a low temperature.
4.It transfers heat from a low temperature to a high temperature.

A. 1 and 3
B. 2 and 3
C. 1 and 4
D. 4 only

SOLUTION

Solution : C

Option: (c)

Question 3

A fuse is used in mains electric supply as a safety device. Which one of the following statements about the fuse is correct?

A. It is connected in parallel with the main switch
B. It is made mainly from silver alloys
C. It must have a low melting point
D. It must have a very high resistance

SOLUTION

Solution : C

Option:(c)

Question 4

Consider the following statements:
In a nuclear reactor, self-sustained chain reaction is possible, because
1.more neutrons are released in each of the fission reactions.
2.the neutrons immediately take part in the fission process.
3.the fast neutrons are slowed down by graphite.
4.every neutron released in the fission reaction initiates further fission.Which of these statements are correct?

A. 1, 2 and 3
B. 1 and 3
C. 2 and 4
D. 2, 3 and 4

SOLUTION

Solution : A

Option:(a)

Question 5

When water is heated form 0°C to 10° C. Its volume

A. Increases
B. Decreases
C. does not change
D. first decreases and then increases

SOLUTION

Solution : D

Option:(d)

Question 6

It S denotes sound energy, E denotes electrical energy and M denotes magnetic energy, the correct representation of recording and reproduction in an audio tape recorder is

A. S M E M S
B. S E M E S
C. E S M S
D. E S E S

SOLUTION

Solution : B

Option:(b)

Question 7

When light waves pass from air to glass, the variables affected are

A. wavelength, frequency and velocity
B. velocity and frequency
C. wavelength and frequency
D. wavelength and velocity

SOLUTION

Solution : D

Option:(d)

Question 8

Consider the following features of newer models of motor cars
1.Radial tyres
2.Streamlined body
3.Multipoint fuel injection
4.Catalytic converter with exhaustWhich of these features make the new models of motor cars more fuel efficient?

A. 1 and 2
B. 2 and 3
C. 2, 3 and 4
D. 1, 3 and 4

SOLUTION

Solution : B

Option:(b)

Question 9

When a CD (compact disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of

A. reflection and diffraction
B. reflection and transmission
C. diffraction and transmission
D. refraction, diffraction and transmission

SOLUTION

Solution : D

Option:(d)

Question 10

Which one of the following does a TV remote control unit use to operate a TV set?

A. Light waves
B. Sound waves
C. Microwaves
D. Radio waves

SOLUTION

Solution : D

Option:(d)

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