Units and Dimensions – Exercise – 1

11. One torr is :

(a) 1 mm of Hg
(b) 1 cm of Hg
(c) 1 m of Hg
(d) 1 atmosphere

Answer
Answer : (a)
Explanation
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12. The unit of magnetic field is :

(a) weber/m2
(b) weber m
(c) m2/weber
(d) weber2/m2

Answer
Answer : (a)
Explanation
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13. Joule degree–1 is the unit for :

(a) Solar constant
(b) Boltzmann’s constant
(c) Stefan’s constant
(d) Planckrsquo;s constant

Answer
Answer : (b)
Explanation
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14. What is the approximate value of the radius of a nucleus ?

(a) 10 m–14
(b) 10 m–31
(c) 10 m–19
(d) 10 m–15

Answer
Answer : (a)
Explanation
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15. Which of the following unit is not of length ?

(a) Light year
(b) Fermi
(c) Angstrom
(d) Becquerel

Answer
Answer : (d)
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