Units and Dimensions – 1 – 10

46. The unit of permittivity of free space, ε0 is :

(a) coulomb/newton-metre
(b) (newton-metre)2 /(coulomb)2
(c) (coulomb)2/(newton-metre)2
(d) (coulomb)2/(newton-metre)2    

ANSWER

EXPLANATION

47. The significant figures of the number 6.0023 is :

(a) 2
(b) 5
(c) 4
(d) 1

ANSWER

EXPLANATION

48. What is the number of significant figures in 0.0310 x 103 ?

(a) 2
(b) 3
(c) 4
(d) 6

ANSWER

EXPLANATION

49. The number of significant figures in 11.118 x 10-6 V is :

(a) 3
(b) 4
(c) 5
(d) 6

ANSWER

EXPLANATION

50. In which of the following numerical values, all zeros are significant?

(a) 0.2020
(b) 20.2
(c) 2020
(d) None of these 

ANSWER

EXPLANATION

1 2 3 4 5 6 7 8 9 10 Exercise 2

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