Free Physics15 Practice Test - IAS 

Question 1

Match List I with List II and select the correct answer from the codes given below the lists.  Codes:

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

SOLUTION

Solution : C

Option:(c)

Question 2

What should be done to increase the pitch of a string instrument?
I.Increase the length of the string used
II.Decrease the guage of the string used
III.Loosen the string
IV.Tighten the string

A. I and IV
B. II and IV
C. I, II and IV
D. I and II

SOLUTION

Solution : B

Option:(b)

Question 3

Which of the following have been found to be true regarding comets?
1.A comet cannot move in a circle.
2.The time that elapses between two returns of a comet to perihelion is called its period.
3.Enck's comet has the shortest known period-about 3.3 years.

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

SOLUTION

Solution : A

Option:(a)

Question 4

In 's third law, the action and reaction forces
1.act on different bodies
2.act on the same body
3.are not always equal
4.are always equal
Choose the correct answer from the codes given below:

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

SOLUTION

Solution : B

Option:(b)

Question 5

Which of the following statements are true regarding heat?
1.Heat is a form of energy
2.Heat can be reflected by a mirror
3.Heat is an electromagnetic radiation
4.Heat cannot pass through vacuum

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

SOLUTION

Solution : A

Option:(a)

Question 6

A person's spectacles have a power of-2.0. The spectacles have ____ and _____ are
1.converging lens
2.diverging lens
3.for short sight
4.for long sight

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

SOLUTION

Solution : C

Option:(c)

Question 7

Copper wires are generally used for electrical power transmission instead of iron wires because

A. copper is a better conductor than iron
B. copper is cheaper than iron
C. copper can take higher power than iron
D. copper is lighter than iron

SOLUTION

Solution : A

Option:(a)

Question 8

Consider the following statements about a thermos flask
1.It is a practical device in which the heat flowing into or out of the system by conduction, convection or radiation is reduced as much as possible.
2.It consists of a double-walled glass vessel.
3.The heat transfer by convection is minimised by silvering the surfaces and the radiation is minimised by evacuating the space between the walls.Of these, the correct ones are

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

SOLUTION

Solution : D

Option:(d)

Question 9

Match List I with List II and select the correct answer from the codes given below the lists.   Codes:

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

SOLUTION

Solution : C

Option:(c)

Question 10

Match List I (Parameters) with List II (Units of Length) and select the correct answer from the codes given below the lists.    Codes:

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

SOLUTION

Solution : B

Option:(b)

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