Unit and Measurement MCQs | Unit and Measurement Multiple Choice Questions(MCQs) & Answers

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Questions
1 Light year is a unit of
A time
B distance
C sunlight intensity
D mass

Answer: Distance
2 The dimensions of Kinetic energy is same as that of
A Force
B Pressure
C Work
D Momentum

Answer: Work
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3 There are 20 divisions in 4 cm of the main scale. The vernier scale has 10 divisions. The least count of the instrument is
A 0.05 cm
B 0.5 cm
C 5.0 cm
D 0.005 cm

Answer: 0.005 cm
4 One kilometer is equal to how many miles?
A 0.84
B 0.5
C 1.6
D 0.62

Answer: 0.62
5 The mass and volume of a body are 4.237 g and 2.5 cm3, respectively. The density of the material of the body in correct significant figures is
A 1.6048 g cm-3
B 1.69 g cm-3
C 1.7 g cm-3
D 1.695 g cm-3

Answer: 1.7 g cm-3
6 Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s-1 ± 0.5 ms-1 B = 0.10 s ± 0.01 s The value of A B will be
A (0.25 ± 0.08) m
B (0.25 ± 0.5) m
C (0.25 ± 0.05) m
D (0.25 ± 0.135) m

Answer: (0.25 ± 0.08) m
7 Electron volt is a unit of
A Potential difference
B Electric current
C Electronic charge
D Energy

Answer: Energy
8 Which of the following quantities is expressed as force per unit area?
A Work
B Area
C Volume
D Pressure

Answer: Pressure
9 A vernier caliper has its main scale of 10 cm equally divided into 200 equal parts. If vernier scale of 25 divisions coincides with 12 mm on the main scale. The least count of the instrument is
A 0.020 cm
B 0.002 cm
C 0.010 cm
D 0.001 cm

Answer: 0.002 cm
10 g cm s2 stands for the unit of
A Energy
B Force
C Momentum
D Acceleration

Answer: Force
11 The number of significant figures in 0.00040 m is
A 1
B 2
C 3
D 4

Answer: 2
12 With due regard for significant figures, (12.5)2 =
A 156.250
B 156.25
C 156.2
D 156

Answer: 156
13 The ratio of the height of a man to the radius of the earth is of the order of
A 109
B 107
C 105
D 103

Answer: 107
14 One torr is equal to
A 1 Nm2
B 1 mm of Hg
C 1 atm pressure
D 1 cm of Hg

Answer: 1 mm of Hg
15 If momentum (P ), area (A) and time ( T ) are taken to be fundamental quantities, then energy has the dimensional formula
A (P1 A-1 T1)
B (P2 A1 T1)
C (P2 A-1/2 T1)
D (P1 A1/2 T-1)

Answer: (P1 A1/2 T-1)
16 Which of the following measurements is most precise?
A 5.00 mm
B 5.00 cm
C 5.00 m
D 5.00 km

Answer: 5.00 mm
17 The number of significant figures in 0.06900 is
A 5
B 4
C 2
D 3

Answer: 4
18 One nanometer is equal to
A 10-6 m
B 10-8 m
C 10-9 m
D 10-5 m

Answer: 10-9 m
19 At 4° C, the density of water is equal to
A 10-3 kg m-3
B 10-2 kg m-3
C 10 kg m-3
D 103 kg m-3

Answer: 103 kg m-3
20 The dimensional formula for Planck’s constant is
A [MLT]
B [ML2T-1]
C [M2L2T-1]
D [ML1T-1]

Answer: [ML2T-1]