[MCQ]Physics MCQs For UPSC(NDA/NA) Exam, SET 7||DEB STUDY

PHYSICS OBJECTIVE Q&A FOR UPSC (NDA/NA) EXAM

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UPSC NDA/NA PHYSICS MCQ Q.1

Sound moves with higher velocity , if

(a) pressure of the medium is decreased
(b) temperature of the medium is increased
(c) humidity of the medium is increased 
(d) both b and c



Ans.(d)

UPSC NDA/NA PHYSICS MCQ Q.2

Which one of the following is the correct angle between the incident and reflected rays when a ray of light incident normally on a plane mirror?
                                                                                                                                               
(a) 180°
(b) 90°
(c) 45°
(d) 0°


Ans.(d)

UPSC NDA/NA PHYSICS MCQ Q.3

Magnetism of a bar magnet can be destroyed if it is 

1. Kept in the magnetic meridian
2. Placed in the direction opposite to that of the Earth's horizontal intensity
3. Heated to a temperature known as Curie temperature

Select the correct answer using the codes given below;

(a) 1 and 3
(b) only 2
(c) 2 and 3
(d) all of the above


Ans.(c)

UPSC NDA/NA PHYSICS MCQ Q.4

When a ship floats on water ?

(a) it displaces no water
(b) the mass of water displaced is equal to the mass of the ship
(c) the mass of water displaced is lesser than the mass of the ship
(d) the mass of water displaced is greater than the mass of the ship


Ans.(b)

UPSC NDA/NA PHYSICS MCQ Q.5

Capacity of a parallel plate condenser can be doubled by 

1. Doubling the area of the plate
2. Doubling the distance of separation between the plates
3. Reducing the distance of separation between the plates to half the original separation
4. Doubling both the areas of the plates and the distance of separation between the plates

Select the correct answer using the codes given below;

(a) 1 and 4
(b) 1 and 3
(c) Only 3
(d) 2 and 3


Ans.(d)

UPSC NDA/NA PHYSICS MCQ Q.6

If two conducting spheres are separately charged and then brought in contact

(a) the total energy of the two spheres is conserved
(b) the total charge on the spheres is conserved
(c) both the total energy and charge are conserved
(d) the final potential is always the mean of the original potential of the two spheres


Ans.(b)

UPSC NDA/NA PHYSICS MCQ Q.7

Two pieces of metallic wire having equal lengths and equal volume placed in air have different resistances. The two wires must 

(a) have different cross-sections
(b) have different temperature
(c) be of different materials
(d) be of same density


Ans.(c)

UPSC NDA/NA PHYSICS MCQ Q.8

If a heater coil is cut into two equal parts and only one part is used in  the heater , the heat generated will be

(a) doubled
(b) four times
(c) one-fourth
(d) halved


Ans.(a)

UPSC NDA/NA PHYSICS MCQ Q.9

The direction of magnetic field at a point due to an infinitely long wire carrying current is

(a) parallel to the current
(b) antiparallel to the current
(c) along the perpendicular drawn from a point on the wire
(d) perpendicular to the plane containing the conductor and the point.


Ans.(d)

UPSC NDA/NA PHYSICS MCQ Q.10

A hollow metal ball carrying an electric charge produces no electric field at point

(a) outside the sphere
(b) on its surface
(c) inside the sphere
(d) only at the centre


Ans.(c)



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