MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements with Answers

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Here you will find NCERT MCQ Questions for Class 11 Physics with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 11 Physics. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

Q1. Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately [NCERT Exemplar]

(a) spheres
(b) planes
(c) paraboloids
(d) ellipsoids

(a) spheres

Q2. Two small spheres each carrying a charge q are placed r metre apart. If one of the spheres is taken around the other one in a circular path of radius r, the work done will be equal to

(a) force between them × r
(b) force between them × 2πr
(c) force between them/2πr
(d) zero

(d) zero

Q3. The electric potential V at any point O (x, y, z all in metres) in space is given by V = 4x² volt. The electric field at the point (1 m, 0, 2 m) in volt/metre is

(a) 8 along negative x-axis
(b) 8 along positive x-axis
(c) 16 along negative x-axis
(d) 16 along positive z-axis

(a) 8 along negative x-axis

Q4. If a unit positive charge is taken from one point to another over an equipotential surface, then

(a) work is done on the charge.
(b) work is done by the charge.
(c) work done is constant.
(d) no work is done.

(d) no work is done.

Q5. A hollow metal sphere of radius 5 cm is charged so that the potential on its surface is 10 V. The potential at the centre of the sphere is

(a) 0 V
(b) 10 V
(c) Same as at point 5 cm away from the surface
(d) Same as at point 25 cm away from the surface

(b) 10 V

Q6. The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is

(a) proportional to the square root of the distance between the plates.
(b) linearly proportional to the distance between the plates.
(c) independent of the distance between the plates.
(d) inversely proportional to the distance between the plates.

(c) independent of the distance between the plates.

Q7. A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system

(a) increases by a factor of 4.
(b) decreases by a factor of 2.
(c) remains the same.
(d) increases by a factor of 2.

(b) decreases by a factor of 2.

Q8. The most suitable instrument for measuring the size of an atom is.

(a) Electron microscope
(b) Vernier calliper
(c) Optical Microscope
(d) Screw gauge

(a) Electron microscope

Q9. In case of measurement of ‘g’, if error in measurement of length of pendulum is 2%, the percentage error in time period is1 %. The maximum error in measurement of g is

(a) 1 %
(b) 2 %
(c) 4 %
(d) No error

(c) 4 %

Q10. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 × 10–3 are

(a) 5, 1, 2
(b) 4, 4, 2
(c) 5, 1, 5
(d) 5, 5, 2

(a) 5, 1, 2

Q11. Choose the correct statement(s)

(a) Topological sort can be used to obtain an evaluation order of a depending graph.
(b) Evaluation order for a dependency graph dicates the order in which the semantic rules are done
(c) Code generation is independent of the order in which the semantic actions are performed
(d) Both (a) and (b)

(d) Both (a) and (b)

Q12. What is the number of significant figures in 0.310×103 ?

(a) 6
(b) 2
(c) 4
(d) 3

(d) 3

Q13. Which of the following is not the unit of energy?

(a) watt-hour
(b) electron-volt
(c) N × m
(d) kg × m/sec2

(d) kg × m/sec2

Q14. In an experiment the angles are required to be measured using an instrument. 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a-degree (= 0.5°), then the least count of the instrument is

(a) One minute
(b) Half minute
(c) One degree
(d) Half degree

(a) One minute

Q15. Electron volt is a unit of

(a) Potential difference
(b) Electric current
(c) Electronic charge
(d) Energy

(d) Energy

Q16. 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

(a) 300
(b) 450
(c) 600
(d) 0

(c) 600

Q17. Resolution is

(a) a measure of the bias in the instrument
(b) None of these
(c) the smallest amount of input signal change that the instrument can detect reliably
(d) a measure of the systematic errors

(d) a measure of the systematic errors

Q18. Absolute error of the measurement is

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

(a) the difference between the individual measurement and the true value of the quantity cubed.

Q19. Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?

(a) Wb/m²
(b) Henry(H)
(c) H/m²
(d) Weber(Wb)

(b) Henry(H)

Q20. Light year is a unit of

(a) time
(b) distance
(c) sunlight intensity
(d) mass

(b) distance

Q21. Which one of the following pairs of quantities and their units is a proper match?

(a) Magnetic flux – weber
(b) Capacitance – henry
(c) Impulse – N/sec
(d) Power – farad

(a) Magnetic flux – weber

Class 11 Physics MCQs Questions with Answers Chapter Wise

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