Free Physics13 Practice Test - IAS 

Question 1

An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then

A. remains horizontal
B. is inclined to the horizontal with smaller depth at the rear end
C. is inclined to the horizontal with larger depth at the rear end
D. assumes parabolic curve

SOLUTION

Solution : C

Option:(c)

Question 2

Diffusion of light in the atmosphere takes place due to

A. carbon dioxide
B. dust particles
C. helium
D. water vapours

SOLUTION

Solution : B

Option:(b)

Question 3

Consider the following statements A 4-wheel vehicle moving in a sharp circular path at high speed will
1.Overturn about its outer wheels
2.Overturn about its inner wheels
3.Skid outwards
4.Skid inwardsWhich of these statements are correct?

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

SOLUTION

Solution : A

Option:(a)

Question 4

Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?

A. Vessel B
B. All the vessels A, B and C will be emptied simultaneously
C. Vessel A
D. Vessel C

SOLUTION

Solution : D

Option:(d)

Question 5

Which of the following stypes of light are strongly absorbed by plants?

A. Violet and orange
B. Blue and red
C. Indigo and yellow
D. Yellow and violet

SOLUTION

Solution : B

Option:(b)

Question 6

Four wires of same material and of dimensions as mentioned below are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?

A. Wire of 1 m length and 2 mm diameter
B. Wire of 2 m length and 2 mm diameter
C. Wire of 3 m length and 1.5 mm diameter
D. Wire of 1 m length and 1 mm diameter

SOLUTION

Solution : C

Option:(c)

Question 7

Consider the following statements
1.A flute of smaller length produces waves of lower frequency.
2.Sound travels in rocks in the form of longitudinal elastic waves only.
Which of the statements given above is/are correct?

A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2

SOLUTION

Solution : B

Option:(b)

Question 8

Which one of the following non-metals is not a poor conductor of electricity?

A. Sulphur
B. Selenium
C. Bromine
D. Phosphorus

SOLUTION

Solution : B

Option:(b)

Question 9

Consider the following statements
1.Steam at 100°C and boiling water at 100°C contain same amount of heat.
2.Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3.In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?

A. 1 and 2
B. 2 and 3
C. Only 2
D. Only 3

SOLUTION

Solution : D

Option:(d)

Question 10

Assertion (A): The weight of a body decreases with the increase of altitude on earth.
Reason (R): The earth is not a perfect sphere.
Codes

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but 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 : B

Option:(b)

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