Free Physics08 Practice Test - IAS 

Question 1

Strips of two metals A and B are firmly jointed together as shown in the figure.
On heating, A expands more than B does. If this jointed strip is heated, then it will appear as

A.
B.
C.
D.

SOLUTION

Solution : B

Option: (b)

Question 2

A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s2. What will be its velocity after 2s ?

A. 9.8 m/s
B. 19.6 m/s
C. 29.4 m/s
D. 39.2 m/s

SOLUTION

Solution : C

Option: (c)

Question 3

Assertion (A) : The temperature of a metal wire rises when an electric current is passed through it.Reason (R) : Collision of metal atoms with each other releases heat energy.

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 : A

Option: (a)

Question 4

One astronomical unit is the average distance between:

A. Earth and the Sun
B. Earth and the Moon
C. Jupiter and the Sun
D. Pluto and the Sun

SOLUTION

Solution : A

Astronomical unit is the average distance between the Earth and the sun during an ear. It is useful to measure and report large distances.

Question 5

A smooth plane inclined at an angle 0 with the horizontal is shown in the given figure. A body starts from rest and slides down on the inclined surface. The time taken by the body to reach the bottom is

A.
B.
C.
D.

SOLUTION

Solution : C

Option: (c)

Question 6

Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?

A. Silicon
B. Oxygen
C. Carbon
D. Calcium

SOLUTION

Solution : A

Option:(a)

Question 7

The working principle of a washing machine is

A. Centrifugal force
B. dialysis
C. reverse osmosis
D. diffusion

SOLUTION

Solution : A

Option:(a)

Question 8

A girl is swinging on a swing in sitting position. When the girl stands up, the period of swing will

A. be shorter
B. be longer
C. depends on the height of the girl
D. not change

SOLUTION

Solution : A

Option:(a)

Question 9

What is the approximate mean velocity with which the earth moves round the sun in its orbit?

A. 20 km/s
B. 30 km/s
C. 40 km/s
D. 50 km/s

SOLUTION

Solution : B

Option:(b)

Question 10

The following processes take place during the launch of a rocket.
What is the proper order in which they take place?
1.Rocket fuel is burnt
2.Gases are produced
3.Rocket moves in the forward direction
4.Gases come out with momentum in backward direction

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

SOLUTION

Solution : A

Option:(a)

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