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NEET 2020 Revision: Unit, Dimension and Measurement - 01
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Question 1
A block is hanging on a spring. The spring is elongated, and the system is in equilibrium. If the elongation of the spring is measured as (10 ± 0.4) cm. The density and volume of the block are measured as (10 ± 0.2) kg/m3 and (5 ± 0.1) m3 respectively. Then the percentage error in the measurement of spring constant.
Question 2
Pressure exerted on a square steel slab is measured by taking measurements of length and force applied. If the maximum error in measurement of length is 1.75% and that of force is 2.5%; What is the maximum error in measurement of pressure?
Question 3
If momentum is given as,
P = Fa.Vb.Tc where F=Force, T=time, V=velocity, P =momentum
Find a, b and c using dimensional analysis.
Question 4
The dimensions of 
are
are Question 5
Two full turns of a circular scale of a screw gauge cover a distance of 1 mm on its main scale. The total number of divisions on the circular scale is 50. Further, it is found that the screw gauge has a zero error of –0.03 mm. While measuring the diameter of a thin wire, a student notes the main scale reading of 3 mm and the number of circular scale divisions in line with the main scale as 35. The diameter of the wire is
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Apr 17NEET & AIIMS
