Physical Quantities & Units

Q: The dimensional formula for volume and force, respectively are given by :

(a) :   [L3],[MLT-2]
(b) :   [L3],[ML2T2]
(c) :   [MLT-2],[L3]
(d) :   [L-3],[ML2T2]
(e) :  None of the Above
Answer:   [L3],[MLT-2]
Explanation:  

Q: Volume of an object has been calculated as 47.7 cm3 with 1.2% uncertainty. The result in cm will be recorded as :

(a) :   47.7±1.2
(b) :   47.7±0.6
(c) :   47.7±0.3
(d) :   47.7±0.1
(e) :  None of the Above
Answer:   47.7±0.6
Explanation:  

Q: From sand, we get a material used for construction of computer chips. That material is:

(a) :  Germanium
(b) :  Silicon
(c) :  Copper
(d) :  Lead
(e) :  None of the Above
Answer:  Silicon
Explanation:  

Q: Examples of physical quantities are:

(a) :  Length
(b) :  Colour
(c) :  Effect of music
(d) :  All of these
(e) :  None of the Above
Answer:  Length
Explanation:  

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