# NCERT Class 11 Physics Chapter 1 Units and Measurements Multiple Choice Questions (MCQ II) (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 13:

Based on dimensions, decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is not correct:

(a)

(b)

(c)

(d)

Answer:

(b) , (c)

Question 14:

If are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?

(a)

(b)

(c)

(d)

(e)

Answer:

(a) , (e)

Question 15:

Photon is quantum of radiation with energy where is frequency and h is Planck՚s constant. The dimensions of h are the same as that of

(a) Linear impulse

(b) Angular impulse

(c) Linear momentum

(d) Angular momentum

Answer:

(b) , (d)

Question 16:

If Planck՚s constant (h) and speed of light in vacuum (c) are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities?

(a) Mass of electron

(b) Universal gravitational constant (G)

(c) Charge of electron (e)

(d) Mass of proton

Answer:

(a) , (b) , (d)

Question 17:

Which of the following ratios express pressure?

(a) Force/Area

(b) Energy/Volume

(c) Energy/Area

(d) For ce/Volume

Answer:

(a) , (b)

Question 18:

Which of the following are not a unit of time?

(a) Second

(b) Parsec

(c) Year

(d) Light year

Answer:

(b) , (d)