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NEET Exam  >  NEET Test  >   Mock Test Series - Updated 2026 Pattern  >  Physics: Topic-wise Test- 3 - NEET MCQ

NEET Physics: Topic-wise Test- 3 Free Online Test 2026


MCQ Practice Test & Solutions: Physics: Topic-wise Test- 3 (45 Questions)

You can prepare effectively for NEET NEET Mock Test Series - Updated 2026 Pattern with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Physics: Topic-wise Test- 3". These 45 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 45 minutes
  • - Number of Questions: 45

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Physics: Topic-wise Test- 3 - Question 1
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Which of the following physical quantities has a unit but no dimensions?

Detailed Solution: Question 1

Among the given physical quantities angle has a unit but no dimensions. Angle = [M°L°T°]
The SI unit of angle is radian.

Physics: Topic-wise Test- 3 - Question 2
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Which of the following physical quantities has neither units nor dimensions?

Detailed Solution: Question 2

Relative density is the ratio of two like quantities.
Therefore, it has neither unit nor dimensions.

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Physics: Topic-wise Test- 3 - Question 3
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Which of the following pairs of physical quantities have same dimensions?

Detailed Solution: Question 3

we know, force = mass × acceleration
energy = Workdone = force × displacement
power = energy/time
torque = force × perpendicular distance between force and axis of rotation. now, by these formula, find dimension of all terms.
Example: dimension of force = [MLT⁻²]
dimension of energy = [ML²T⁻²]
dimension of power = [ML²T⁻³]
dimension of torque = [ML²T⁻²]
Here it is clear that dimension of energy and dimension of torque are equal.
Hence, option (b) is correct.

Physics: Topic-wise Test- 3 - Question 4
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If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?

Detailed Solution: Question 4

Physical quantities having different dimensions cannot be added or subtracted.
As P, Q and R are physical quantities having different dimensions, therefore they can neither be added nor be subtracted.
Thus, (a) can never be a meaningful quantity.

Physics: Topic-wise Test- 3 - Question 5
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Which of the following statements is incorrect regarding significant figures?

Detailed Solution: Question 5

The power of 10 is irrelevant to the determination of significant figures.

Physics: Topic-wise Test- 3 - Question 6
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The value of resistance is 10.845 Ω and the current is 3.23 A. On multiplying, we get the potential difference is 35.02935 V. The value of potential difference in terms of significant figures would be

Detailed Solution: Question 6

The final result should be 3 significant figures.

Physics: Topic-wise Test- 3 - Question 7
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The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. The total mass of the box is:

Detailed Solution: Question 7

Here, mass of the box, m = 2.3 kg
Mass of one gold piece, m1 = 20.15 g = 0.02015 kg
Mass of other gold piece, m2 = 20.17 g = 0.02017 kg
∴ Total mass = m + m1 + m2
= 2.3 kg + 0.02015 kg + 0.02017 kg = 2.34032 kg
As the result is correct only upto one place of decimal, therefore, on rounding off, we get
Total mass = 2.3 kg

Physics: Topic-wise Test- 3 - Question 8
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A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the time in seconds at which the stone reaches its maximum height.

g =9.8 m / sec2

Detailed Solution: Question 8

Physics: Topic-wise Test- 3 - Question 9
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A truck covers 40.0 m in 8.50 s while smoothly slowing down to a final speed of 2.80 m/s. Find its acceleration in m/s2

Detailed Solution: Question 9

Physics: Topic-wise Test- 3 - Question 10
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A truck is coming towards you from a distance of 1000m on a straight road, at time t=0. The driver stops for a second near a poster. He reaches you in 100 sec. The average speed in m/s is

Detailed Solution: Question 10

Physics: Topic-wise Test- 3 - Question 11
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A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. Determine the maximum height it travels in meters. g =9.8 m / sec2

Detailed Solution: Question 11

Explanation:

Initial velocity u = 20.0 m/s

At maximum height stone will  be stopped, 

So final velocity v = 0 m/s

Acceleration due to gravity
a = g = -9.8 m/s​​​​​​2 (-ve Because it is in opposite direction of motion)

Let maximum height = s

We know,

Physics: Topic-wise Test- 3 - Question 12
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A person moves 30 m north, then 30 m east, then 30√2​ m  south-west. His displacement from the original position is:

Detailed Solution: Question 12

Resolving displacement 30√2 m south-west into two rectangular components, we get
Displacement in south

∴ Effective displacement due to 30 m north and 30 m south is zero.
Also effective displacement due to 30 m east and 30 m west in zero.

Physics: Topic-wise Test- 3 - Question 13
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A bird flies from (-3m, 4m, -3m) to (7m, -2m, -3m) in the xyz- coordinates. The bird's displacement vector is given by

Detailed Solution: Question 13

Physics: Topic-wise Test- 3 - Question 14
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On an open ground, a motorist follows a track that turns to his left by an angle of 60° after every 500 m. Starting from a given turn, the displacement of the motorist at the third turn is

Detailed Solution: Question 14

The path followed by the motorist is a regular hexagon ABCDEF of side 500 m, as shown in the given figure. Let the motorist starts from A and takes the third turn at D.
image
Therefore, the magnitude of this displacement is 
​AD = AG + GD = 500 m + 500 m = 1000 m 

Physics: Topic-wise Test- 3 - Question 15
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Four girls skating on circular ice ground of radius 200 m start from a point P on the edge of the ground and reach a point Q diametrically opposite to P following different paths as shown in figure. For which girl displacement is equal to the actual length of path?

Detailed Solution: Question 15

Displacement of each girl = 
Magnitude of displacement for each girl
For girl C, displacement = actual length of path.

Physics: Topic-wise Test- 3 - Question 16
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A particle starts moving from point (2, 10, 1). Displacement for the particle is The final coordinates of the particle is

Detailed Solution: Question 16

Initial position vector of the particle,
Let final position vector of the particle be

Hence, the final coordinates of the particle are ((10, 8, 2)

Physics: Topic-wise Test- 3 - Question 17
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Rain falls at a speed of 50m/s and a child walks on a straight road from east to west at a speed of 100m/s. To find the direction in which the child should hold the umbrella use

Detailed Solution: Question 17

The child should hold the umbrella in the direction at which the rain appears to fall on him, which is the direction of relative speed of rain with respect to the  child.

Physics: Topic-wise Test- 3 - Question 18
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 Which of the following quantity does not remain constant during the uniform circular motion?

Detailed Solution: Question 18

  1. Linear momentum is not constant but angular momentum is
  2. Speed has to be constant for “uniform” circular motion
  3. For obvious reasons ω is constant
  4. And the same goes for α

Physics: Topic-wise Test- 3 - Question 19
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The motion of a freely falling body is an example of:

Detailed Solution: Question 19

A freely falling body observes a constant downwards force of gravity which hence applies a constant downward acceleration upon the body.

Physics: Topic-wise Test- 3 - Question 20
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A pair of equal and opposite forces with different line of action are said to form a

Detailed Solution: Question 20

When two forces of equal magnitude opposite in direction and acting along parallel straight lines, then they are said to form a couple. The perpendicular distance between the two force forming a couple is called the arm of the couple.

Physics: Topic-wise Test- 3 - Question 21
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A meter rule is supported at its centre. It is balanced by two weights, A and B. If A and B are placed at a distance 20 cm, and 40 cm from the centre of scale, find the weight of B. The weight of A is 50N.

Detailed Solution: Question 21

In balanced condition torque of the both sides must be equal so Fa × Da = Fb × Db
50 × 20 = Fb × 40
Fb = 25 N

Physics: Topic-wise Test- 3 - Question 22
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Determine the force that must be applied to end of the class 1 lever shown below to lift the 500 lb load.

Detailed Solution: Question 22

Balance the 2 opposite moments of inertia on the 2 sides
1 × 500 = F × 5
F = 100

Physics: Topic-wise Test- 3 - Question 23
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Five forces are separately applied to a flat object lying on a table of negligible friction as shown in figure. The force which will not cause the object to rotate about the centre of the object is
  

Detailed Solution: Question 23

The line of action of F2 passes through the centre of rotation, and thus cannot produce a torque about the centre (r = 0).

Physics: Topic-wise Test- 3 - Question 24
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Which of the following appliance works on the principle of moments.

Detailed Solution: Question 24

In beam balance we consider the torque at centre of beam which is moment of force at its each end.

Physics: Topic-wise Test- 3 - Question 25
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There are two blocks of mass 3 kg and 5 kg hanging from the ends of a rod of negligible mass. The rod is marked in eight equal parts as shown. At which of the points indicated should a string be attached if a rod is to remain horizontal when suspended from the string?
    

Detailed Solution: Question 25

This is based on torque balance, That is F.d=const.
Therefore 3×d=5×(8-d)
by solving we get d=5.
and at point 5=E

Physics: Topic-wise Test- 3 - Question 26
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Consider two configurations of a system of three particles of masses m, 2m and 3m. The work done by external agent in changing the configuration of the system from figure (i) to figure (ii) is

 

Physics: Topic-wise Test- 3 - Question 27
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Three solid spheres each of mass m and radius R are released from the position shown in figure. The speed of any sphere at the time of collision would be

Detailed Solution: Question 27

From conservation of mechanical energy

 

 

Physics: Topic-wise Test- 3 - Question 28
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n – particles each of mass m0 are placed on different corners of a regular polygon of edge length a. The distance between vertex and centre of polygon is r0 . The gravitational potential at the centre of the polygon is

Detailed Solution: Question 28

Physics: Topic-wise Test- 3 - Question 29
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If an artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of the escape velocity form the earth, the height of the satellite above the surface of the earth is

Detailed Solution: Question 29

on solving we get;h = r

Physics: Topic-wise Test- 3 - Question 30
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An increase in temperature in a liquid would cause a phase change to which of the following?

Detailed Solution: Question 30

Increasing the temperature of liquid, increases the average K.E. of the molecules. The molecules start moving vigorously in all the directions, thereby increasing and the inter-molecular space between them. Thus, the liquid changes into gas.

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This test contains 45 MCQs on Physics: Topic-wise Test- 3 with detailed solutions for each question. It is part of the NEET Mock Test Series - Updated 2026 Pattern course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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