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Class 11 Physics (Part I) Chapter 1 Physical World And Measurement Quiz 5 (9 MCQs)

Quiz Instructions

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1. The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of

Correct Answer: A) Frequency.

2. Which of the following is dimensional constant

Correct Answer: B) Gravitational constant.

3. The value of Chandra Shekher Limit is

Correct Answer: C) 1.4 times the mass of Sun.

4. A pair of physical quantities having same dimensional formula is

Correct Answer: B) Work and enegry.

5. A quantity y is related to another quantity x by the equation y = kx$^{a}$ where k and a are constants. If percentage error in the measurement of x is p, then that in y depends upon:

Correct Answer: B) P and a.

6. If enegry (E), velocity (v) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be

Correct Answer: C) [Ev$^{-2}$T$^{-2}$].

7. The word Science originates from the Latin verb Scientia meaning

Correct Answer: B) To know.

8. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1x10$^{-3}$ are

Correct Answer: B) 5, 1, 2.

9. Of the following quantities, which one has dimensions different from the remaining three?

Correct Answer: D) Angular momentum.

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