Units and Dimensions – 2 – 8

86. Dimension of velocity gradient is :

(a) M 0 L 0–1
(b) M L –1–1
(c)0 L T –1
(d) M L 0–1

ANSWER

EXPLANATION

87. Which of the following is the dimensions of the coefficient of friction?

(a) M 2 L 2
(b)0 L 00
(c) M L 2–2
(d)2 L 2–2

ANSWER

EXPLANATION

88. The dimensional formula for thermal resistance is :

(a) M L 2–3 –1
(b) M L 2–2 –1
(c) M L 2–3 –2
(d)–1 L –23 K

ANSWER

EXPLANATION

89. Dimensions of relative density is :

(a) M L –2
(b) M L –3
(c)2 L –6
(d) dimensionless

ANSWER

EXPLANATION

90. The dimensional representation of specific resistance in terms of charge Q is :

(a) M L 3–1 –2
(b) M L 2–2 2
(c) M L T –2 –1
(d) M L 2–2 –1

(d) not expressible in terms of M, L and T

ANSWER

EXPLANATION

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