Physics NEET Units and Dimensions Practice Multiple choice questions with solutions

Physics Units and Dimensions some multiple choice questions with answers and solutions are given for practice.

Physics solutions : based on 10 + 2 syllabus.

You should study the Physics textbook lesson Units and measurements NCERT or other.

You must observe the answers. Please check whether the solutions given are related in the textbook lesson.

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Units and Dimensions multiple choice questions with solutions Physics NEET UG

Physics

Units and measurements

Multiple choice Questions

Practice test 1

1) The dimensions of torque are ;

2) The dimensions of universal gravitational constant are :

3) Using mass (M), length (L), Time (T) and current (A) are fundamental quantities, the dimensions of permeability are ;

4) Which of the following pairs does not have similar dimensions?

1. Tension and surface tension

2. Stress and pressure

3. Plank’s constant and angular momentum

4. Angle and strain

5) Dimension formula of ∆Q, heat supplied to the system is given by

6) Find the dimension formula of polarization?

7) The unit of thermal conductivity is

8) If force (F), velocity (V) and time (T) are taken as fundamental units, then the dimension of mass are

9) Match list I with II and select the correct answer:

10) The equation of state of some gases can be expressed as

Where P is the pressure, V is the volume, T is the absolute temperature and a, b & R are constants. The dimensions of ‘a’ are :

Answers for practice test 1

1) 3

2) 4

3) 3

4) 1

5) 1

6) 1

7) 4

8) 4

9) 1

10) 1

Solutions for practice test 1

Practice test 2

Multiple choice Questions

1. The density of a material in CGS system of units is 4 g/cubic cm. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, the value of density of material will be :

2. Plank’s constant (h), Speed of light in vacuum (c) and Newton’s gravitational constant (G) are three fundamental constants. Which of the following combinations of these has the dimension of length ?

3. Dimensional formula of magnetic field is :

4. Dimensional formula of angular momentum is :

5. A physical quantity of the dimensions of length that can be formed out of c, G and

Is : ( c is velocity of light, G is universal constant of gravitation and e is charge )

6. What is the dimensions of magnetic field B in terms of C (coulomb), M, L and T

7. If the energy

Where G is the universal gravitational constant, h is the Plank’s constant and c is the velocity of light, then the values of p, q and r are respectively

1) -1/2, 1/2 and 5/2

2) 1/2, -1/2 and -5/2

3) -1/2, 1/2 and 3/2

4) 1/2, 1/2 and -3/2

8. The dimensions of universal gravitational constant are :

9. Dimension of magnetic permeability is :

10. The dimensions of

Answers for practice test 2

1) 3

2) 3

3) 2

4) 1

5) 4

6) 2

7) 1

8) 4

9) 4

10) 3

Solutions for practice test 2

Self practice test 3

1) The quantities which have the same dimensions as those of solid angle are :

1. strain and angle

2. stress and angle

3. strain and arc

4. angular speed and stress

2) Dimensions of kinetic energy is the same as that of :

1. velocity

2. acceleration

3. work

4. force

3) In a vernier callipers, (N + 1) divisions of vernier scale coincide with N divisions of main scale. If 1 MSD represents 0.1 mm the vernier constant (in cm) is :

1. 1/10N

2. 1/100(N+1)

3. 100N

4. 10(N+1)

4) The percentage errors in the measurement of mass and momentum of an object are 1% and 2% respectively. The percentage error in the measurement of kinetic energy of the object will be :

1. 1%

2. 3%

3. 4%

4. 5%

5) The area of a rectangular field (in square metre) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digits is :

6) If E and G respectively denote energy and gravitational constant, then E/G has the dimensions of :

7) 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,

8) 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 division above the reference level. If screw gauge has a zero error of – 0.004 cm the correct diameter of the ball is :

1. 0.521 cm

2. 0. 525 cm

3. 0. 053 cm

4. 0. 529 cm

9) The physical quantity that has the same dimensional formula as pressure is :

1. Coefficient of viscosity

2. Force

3. Momentum

4. Young’s modulus of elasticity

10) The dimensional formula of stress is :