Units and Dimensions – Exercise – 2

91. The magnetic moment has dimensions of :

(a) L A
(b) A
(c) L T –1 A
(d)T –1 A

Answer
Answer : (b)
Explanation
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92. The dimension of impulse is :

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

Answer
Answer : (a)
Explanation
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93. Dimensions of electrical resistance are :

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

Answer
Answer : (b)
Explanation
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94. The dimensional formula for Planck’s constant and angular momentum is :

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

Answer
Answer : (b)
Explanation
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95. A force is given by F = at + bt2, where t is the time. The dimensions of a and b are :

(a) [M L T –4] and [M L T]
(b) [M L T –1] and [M L T 0]
(c) [M L T –3] and [M L T –4]
(d) [M L T –3] and [M L T 0]

Answer
Answer : (c)
Explanation
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