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

Physics - Physics and Measurement
Fundamental and Derived Units, Least Count and Significant Figures

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


13.
Which of the following physical quantities has the same SI unit as that of energy?
A.
Power
B.
Force
C.
Torque
D.
Pressure
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ANSWER :
C. Torque
14.
The SI unit of the coefficient of viscosity (η) is:
A.
Poise
B.
Pascal
C.
Pa·s (poiseuille)
D.
N/m
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ANSWER :
C. Pa·s (poiseuille)
15.
Which one of the following does NOT have the dimensional formula [ML²T⁻²]?
A.
Work done
B.
Kinetic energy
C.
Torque
D.
Linear momentum
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ANSWER :
D. Linear momentum
16.
The unit of surface tension in SI is N/m. Its dimensional formula is:
A.
[MT⁻²]
B.
[MLT⁻²]
C.
[ML⁻¹T⁻²]
D.
[ML²T⁻²]
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ANSWER :
A. [MT⁻²]
17.
In SI, the unit for luminous intensity (candela) is defined using radiation of frequency:
A.
540 × 10¹⁰ Hz
B.
540 × 10¹¹ Hz
C.
540 × 10¹² Hz
D.
540 × 10¹³ Hz
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ANSWER :
C. 540 × 10¹² Hz
18.
A derived unit that contains all three mechanical base units (mass, length, time) is:
A.
Velocity (m/s)
B.
Pressure (Pa)
C.
Frequency (Hz)
D.
Area (m²)
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ANSWER :
B. Pressure (Pa)
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