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Units and Dimensions – 1 – 2

6. Which of the following physical quantity is fundamental ?

(a) viscosity
(b) velocity
(c) force
(d) time

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

7. If the wavelength of the green line of the visible spectrum is 546 nm, its value in metre is :

(a) 546 × 10–10
(b) 546 × 10–19
(c) 54.6 × 10–8
(d) 54.6 × 109

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

8. Which one of the following has not been expressed in proper units ?

(a) power : kg m2 s–3
(b) pressure : kg m–2 s–2
(c) momentum : kg m s–1
(c) all of the above.

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

9. The intensity of the electric field has the unit :

(a) newton/coulomb
(b) newton/ampere
(c) ampere/newton
(d) none of these

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

10. What is the dimension of the physical quantity α in the equation,

P = density/α,

where P is the pressure ?

(a) M L –1
(b) M L –2
(c) L –2 2
(d) M L –2 2

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

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