Fundamental and Derived Units, Least Count and Significant Figures NEET Questions

Physics - Physics and Measurement

Fundamental and Derived Units, Least Count and Significant Figures MCQ Questions


1.
In the CGS system, the base units for length, mass and time are respectively:
A.
Metre, gram, second
B.
Centimetre, kilogram, second
C.
Centimetre, gram, second
D.
Foot, gram, second
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ANSWER :
C. Centimetre, gram, second
2.
In the measurement 0.00250 kg, the number of significant figures is:

NEET - 2015

A.
2
B.
3
C.
4
D.
5
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ANSWER :
B. 3
3.
Which of the following set contains ONLY fundamental (base) quantities in SI?
A.
Length, velocity, mass
B.
Length, mass, time, electric current, temperature, amount of substance, luminous intensity
C.
Force, mass, time
D.
Energy, mass, length
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ANSWER :
B. Length, mass, time, electric current, temperature, amount of substance, luminous intensity
4.
The SI unit of pressure is:

NEET - 2016

A.
Newton
B.
Pascal
C.
Dyne/cm²
D.
Atmosphere
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ANSWER :
B. Pascal
5.
The SI unit of amount of substance is mole. One mole contains exactly:
A.
6.022 × 10²² entities
B.
6.022 × 10²³ entities
C.
6.022 × 10²⁴ entities
D.
9.109 × 10²³ entities
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ANSWER :
B. 6.022 × 10²³ entities
6.
Which of the following is a derived unit?

NEET - 2017

A.
Meter
B.
Kilogram
C.
Newton
D.
Second
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ANSWER :
C. Newton