Olete.in – MCQs, Mock Tests & Government Job Prep | CBES Board Class 11 MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements

Physical quantities are

1. quantities such as degrees, radians and steradians
2. quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
3. quantities such as pounds, dollars and rupees
4. quantities such as kilos, pounds and gallons

✅ Correct Answer: 2

The atmospheric pressure is 106 dyne/cm². What is its value in SI unit?

1. 105 newton/m²
2. 106 newton/m²
3. 104 newton/m²
4. 103 newton/m²

✅ Correct Answer: 1

In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is

1. FA2T
2. FAT2
3. FA2T
4. FAT

✅ Correct Answer: 2

Which of the following groups have different dimensions?

1. Potential difference, EMF, voltage
2. Pressure, stress, Youngs modulus
3. Heat, energy, work done
4. Dipole moment, electric flux, electric field

✅ Correct Answer: 4

ML-1T -2 is the dimensional formula of

1. magnetic induction
2. self-inductance
3. electric potential
4. electric field

✅ Correct Answer: 1

What is the dimensional formula of magnetic field?

1. MT-2A-1
2. MT-1A-2
3. M-1L-2TA-1
4. M-1LTA-2

✅ Correct Answer: 1

In SI system the fundamental units are

1. meter, kilogram, second, ampere, Kelvin, mole and candela
2. meter, kilogram, second, coulomb, Kelvin, mole and candela
3. meter, Newton, second, ampere, Kelvin, mole and candela
4. meter, kilogram, second, ampere, Kelvin, mole and lux

✅ Correct Answer: 2

Which one of the following represents the correct dimensions of the coefficient of viscosity?

1. [ML-1T-2]
2. [MLT-1]
3. [ML-1T-1]
4. [ML-2T-2]

✅ Correct Answer: 3

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of

1. 300
2. 450
3. 600
4. 0

✅ Correct Answer: 3

Resolution is

1. a measure of the bias in the instrument
2. None of these
3. the smallest amount of input signal change that the instrument can detect reliably
4. a measure of the systematic errors

✅ Correct Answer: 4

Absolute error of the measurement is

1. the difference between the individual measurement and the true value of the quantity cubed. (b). (c) (d)
2. the difference between the individual measurement and the true value of the quantity squared
3. the difference between two individual measurements and their mean
4. the difference between the individual measurement and the true value of the quantity

✅ Correct Answer: 1

Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?

1. Wb/m²
2. Henry(H)
3. H/m²
4. Weber (Wb)

✅ Correct Answer: 1

Light year is a unit of

1. time
2. distance
3. sunlight intensity
4. mass

✅ Correct Answer: 2