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NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 PDF Download

2024

Q1: In a vernier callipers, (N + 1) divisions of vernier scale coincide with N divisions of main scale. If  1MSD represents  0.1mm, the vernier constant (in cm) is:       [2024]
(a) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(b) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(c) 00N
(d) 10(N + 1)
Ans: 
(b)
V.C = MSD VSD ..... (1)
given : (N + 1)VSD=N MSD
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 ..... (2)
From (1) and (2)
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Q2: The quantities which have the same dimensions as those of solid angle are:      [2024]
(a) strain and angle
(b) stress and angle
(c) strain and arc
(d) angular speed and stress
Ans:
(a)
Solid angle NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 has dimensions  NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
Strain =NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 has dimensions  NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
Angle measured in radians is also dimensionless   NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Q3: A force defined by NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 acts on a particle at a given time t. The factor which is dimensionless, if α and β are constants, is:      [2024]
(a) βt / α
(b) αt / β
(c) αβt
(d) αβ / t
Ans: 
(b)
From principle of homogeneity
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

2023

Q1: A metal wire has mass (0.4 ± 0.002) g, radius (0.3 ± 0.001) mm and length (5 ± 0.02) cm. The maximum possible percentage error in the measurement of density will nearly be     [2023]
(a) 1.2%
(b) 1.3%
(c) 1.6%
(d) 1.4%
Ans: 
(c)
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Question for NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement
Try yourself:Q2: The errors in the measurement which arise due to unpredictable fluctuations in temperature and voltage supply are      [2023]
View Solution

Q3:  The diameter of a spherical bob, when measured with vernier callipers yielded the following values :   3.33 cm,3.32 cm,3.34 cm,3.33 cm and  3.32 cm. The mean diameter to appropriate significant figures is : 
(a) 3.328 cm
(b) 3.3 cm
(c) 3.33 cm
(d) 3.32 cm
Ans:
(c)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11


Q4: The mechanical quantity, which has dimensions of reciprocal of mass (M−1) is :    [2023]
(a) angular momentum
(b) coefficient of thermal conductivity
(c) torque
(d) gravitational constant
Ans:
(d)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

2022

Q1: The physical quantity that has the same dimensional formula as pressure is       [2022]
(a) Coefficient of viscosity
(b) Force
(c) Momentum
(d) Young's modulus of elasticity
Ans: 
(d)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11


Q2: The percentage error in the measurement of g is : (Given that  NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11, NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11s)
(a) 7%
(b) 2%
(c) 5%
(d) 3%
Ans:
(d)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Q3: The dimensions [MLT–2A–2 ] belong to the              [2022]
(a) Self-inductance
(b) Magnetic permeability
(c) Electric permittivity
(d) Magnetic flux

Ans: (b)
Solution:
The dimensional formula of magnetic permeability is [MLT–2A–2 ]

Q4: The area of a rectangular field (in m) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is                           [2022]
(a) 1382 

(b) 1382.5
(c) 14 * 10 
(d) 138 * 10
1
Ans: (c)
Solution:
Area = Length × Breadth

= 55.3 × 25 m2
= 1382.5 m2 
= 14 × 102 m2
(Rounding off of two significant figures)

Q5: Match List-I with List-II
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Choose the correct answer from the options given below                 [2022]
(a) (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii) 

(b) (a) - (ii), (b) - (iv), (c) - (iii), (d) - (i) 

(c) (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii) 

(d) (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
Ans: (a)
Solution:
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Question for NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement
Try yourself:Q6: Plane angle and solid angle have       [2022]
View Solution
 

2021

Q1: A Screw Guage gives the following readings when used to measure the diameter of a wire.
Main scale reading = 0.0 mm
Circular scale reading = 52 divisions
Given that: 1 mm on the main scale corresponds to 100 divisions of the circular scale.
The diameter of the wire from the above data is:
    [2021]
(a) 0.026 cm
(b) 0.005 cm
(c) 0.52 cm
(d) 0.052 cm
Ans: 
(d)
Solution: Diameter of wire,

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Q2: If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.    [2021]
(a) [F][A][T-1]
(b) [F][A-1][T]
(c) [F][A][T]
(d) [F][A][T2]
Ans: 
(d)
Solution:

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Q3: If E and G respectively denote energy and gravitational constant, then E/G has the dimensions of :    [2021]
(a) [M] [L0] [T0]
(b) [M2] [L–2] [T–1]
(c) [M2] [L–1] [T0]
(d) [M] [L–1] [T–1]
Ans: 
(c)
Solution:

E = energy = [ML2T–2]
G = Gravitational constant = [M–1L3T–2]
So,
E/G = [E]/[G]
= ML2T–2/M–1L3T–2
= [M2L-1T0]

2020

Q1: A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale.   [2020]
The pitch of the screw gauge is :
(a) 0.25 mm
(b) 0.5 mm
(c) 1.0 mm
(d) 0.01 mm
Ans: 
(b)
Least count of screw gauge = NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11


Q2: Taking into account of the significant figures, what is the value of 9.99 m-0.0099 m?    [2020]
(a) 9.980 m
(b) 9.9 m
(c) 9.9801 m
(d) 9.98 m

Ans: (d)
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
As per rule
least no. of place in decimal portion of any number 9.98


Q3: Dimensions of stress are :   [2020]
(a) [ML2T-2]
(b) ML0T-2]
(c) ML-1T-2]
(d) MLT-2]
Ans: 
(c)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11


Q4: The energy required to break one bond in DNA is 10-20 J. This value in eV is nearly :   [2020]
(a) 0.6
(b) 0.06
(c) 0.006
(d) 6
Ans:
(b)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

2019

Q1: In an experiment, the percentage of error occurred in the measurement of physical quantities A, B, C and D are 1%, 2%, 3% and 4% respectively. Then the maximum percentage of error in the measurement X, where NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 will be     [2019]
(a) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(b) 16 %
(c) -10 %
(d) 10 %
Ans:
(b)
Given
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
 NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
= 2% + 1%+ 1%+ 12%= 16%

2018

Q1: A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of – 0.004 cm, the correct diameter of the ball is :-    [2018]
(a) 0.521 cm
(b) 0.525 cm
(c) 0.053 cm
(d) 0.529 cm

Ans: (d)
Solution:
Reading of screw gauge
= MSR + VSR × LC + zero error
= 0.5 cm + 25 × 0.001 cm + 0.004 cm
= 0.529 cm

2017

Q1: A physical quantity of the dimensions of length that can be formed out of NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 is velocity of light, G is universal constant of gravitation and e is charge] :-    [2017]


(a) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(b) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(c) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(d) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
Ans: (d)
Solution:

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

2016

Q1: Planck's constant (h), speed of light in vacuum (c) and Newton's gravitional constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?           [2016]
(a) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(b) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(c) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
(d) NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
Ans: 
(a)
According to question,
 hp cq Gr
[M0LT0] = [ML2T-1]p [LT-1]q [M-1L3T-2]r
Equating power both sides, we get
p - r = 0        ......(1)
2p + q + 3r = 1        ......(2)
- p - q - 2r = 0        ......(3)
Solving equation (1), (2), (3), we get 

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

2015

Q1: If dimensions of critical velocity vc of a liquid flowing through a tube are expressed as NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11 where η,ρ and r are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of x, y and z are given by
(a) 1, −1, −1
(b) 1, 1, 1
(c) 1, −1, −1
(d) −1, −1, 1                  [2015]
Ans:
(c)

NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11

Put dimensions of various quantities,
[M0LT-1] = [ML-1T-1]x [ML-3T0]y [M0LT0]z
                = [Mx + y L- x - 3y + z T- x]
Equating power both sides, we get
x + y = 0;
- x - 3y + z = 1;
- x = - 1
On solving, we get
x = 1, y = -1, z = -1 

Question for NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement
Try yourself:Q2: If energy (E), velocity (V) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be:    [2015]
View Solution

2014

Q1: If force (F), velocity (V) and time(T) are taken as fundamental units, then the dimensions of mass are:    [2014]
(a) [F V−1 T−1]
(b) [F V−1 T]
(c) [F V T−1]
(d) [F V T−2]
Ans:
(b)
Solution:
NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement | Physics Class 11
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FAQs on NEET Previous Year Questions (2014-2024): Physical World, Units & Measurement - Physics Class 11

1. What is the concept of physical world in the context of NEET exam?
Ans. The concept of physical world in the NEET exam refers to the study of the basic principles and laws that govern the physical universe, including topics such as motion, energy, and forces.
2. How are units important in the field of measurements for the NEET exam?
Ans. Units are crucial in measurements for the NEET exam as they provide a standard of comparison and ensure that measurements are accurate and consistent across different experiments and studies.
3. What are the common measurement units used in the NEET exam for physical quantities?
Ans. Common measurement units used in the NEET exam for physical quantities include meters for length, kilograms for mass, seconds for time, and Newtons for force, among others.
4. How does understanding the physical world and units help in solving NEET exam questions?
Ans. Understanding the physical world and units is essential for solving NEET exam questions as it enables students to apply the correct principles and formulas to solve problems accurately and efficiently.
5. Why is it important for NEET aspirants to have a strong grasp of the concepts related to physical world, units, and measurements?
Ans. Having a strong grasp of these concepts is crucial for NEET aspirants as questions related to physical world, units, and measurements are frequently asked in the exam, and a good understanding of these topics can significantly improve performance and scores.
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