Free Physics05 Practice Test - IAS 

Question 1

Which of the following are true regarding transmission of television programmes?
1.Picture is transmitted with the velocity of light
2.Sound is transmitted with the velocity of sound
3.Sound is transmitted with the velocity of light
4.Different colors of the pictures are transmitted with different velocities

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

SOLUTION

Solution : D

Option: (d)

Question 2

When a mirror is rotated by an angle θ, the reflected ray will rotate by

A. 0o
B. θ/2
C. θ
D. 2θ

SOLUTION

Solution : D

Option:(d)

Question 3

Suppose a rocket ship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?

A. Blue
B. Orange
C. Yellow
D. Indigo

SOLUTION

Solution : A

Option: (a)

Question 4

Assertion (A): A diamond will shine more than a glass imitation cut to the same shape.
Reason (R) : The refractive index of diamond is less than that of glass.In context of the above two statements, which one of the following is correct?

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true and R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

SOLUTION

Solution : C

Option: (c)

Question 5

A parachutist jumps from a height of 5000 m. The relationship between his falling speed, v and the distance fallen through, d is best represented as

A.
B.
C.
D.

SOLUTION

Solution : D

Option: (d)

Question 6

The technique used to transmit audio signals in television broadcasts is

A. Amplitude Modulation
B. Frequency Modulation
C. Pulse Code Modulation
D. Time Division Multiplexing

SOLUTION

Solution : B

Option:(b)

Question 7

Cryogenic engines find applications in

A. sub-marine propulsion
B. frost-free refrigerators
C. rocket technology
D. researcher in superconductivity

SOLUTION

Solution : C

Option:(c)

Question 8

An air bubble in water will act like a

A. convex mirror
B. convex lens
C. concave mirror
D. concave lens

SOLUTION

Solution : D

Option: (d)

Question 9

When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

A. pitch, loudness and quality
B. pitch and loudness
C. quality only
D. loudness only

SOLUTION

Solution : C

Option: (c)

Question 10

Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the lists

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

SOLUTION

Solution : C

Option:(c)

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