Units and Measurements Quiz | Units and Measurements Multiple Choice Questions and Answers

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Questions
1 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
2 Electron volt is a unit of
A Charge
B Potential difference
C Energy
D Magnetic Force

Answer: Energy
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3 The equation of state of some gases can be expressed as Vander wal equation i.e. (P + a/v2)(V – b) = RT Where P is the pressure, V is the volume, T is the absolute temperature and a, b, R are constants. The dimensions of ‘a’ are:
A [M1L1T-1]
B [M1L-5T1]
C [M2L5T-1]
D [M1L5T-2]

Answer: [M1L5T-2]
4 Which of the following pairs has the same dimensions?
A Specific Heat and Latent Heat
B Impulse and Momentum
C Surface Tension and Force
D Moment of Inertia and Torque

Answer: Impulse and Momentum
5 One watt hour contains how many joules?
A 3.6 ✕ 108 J
B 3.6 ✕ 102 J
C 3.6 ✕ 103 J
D 10-3 J

Answer: 3.6 ✕ 103 J
6 At 4° C, the density of water is equal to
A 103 kg m-3
B 10-3 kg m-3
C 10-2 kg m-3
D 10 kg m-3

Answer: 103 kg m-3
7 The dimensions of Kinetic energy is same as that of
A Force
B Pressure
C Work
D Momentum

Answer: Work
8 The surface tension of a liquid is 70 dyne/cm. In MKS system its value is?
A 70 N/m
B 7 ✕ 10-2 N/m
C 7 ✕ 102 N/m
D 7 ✕ 103 N/m

Answer: 7 ✕ 10-2 N/m
9 The dimensional formula for Planck’s constant is
A [MLT]
B [ML2T-1]
C [M2L2T-1]
D [ML1T-1]

Answer: [ML2T-1]
10 Light year is a unit of
A time
B distance
C sunlight intensity
D mass

Answer: distance
11 What is the unit for measuring the amplitude of a sound?
A Decibel
B Coulomb
C Hum
D Cycles

Answer: Decibel
12 One fathom is equal to
A 6 feet
B 100 cm
C 60 feet
D 6 meters

Answer: 6 feet
13 Light year is a measurement of
A Speed of aeroplanes
B Speed of light
C Stellar distances
D Speed of rockets

Answer: Stellar distances
14 One kilometer is equal to how many miles?
A 0.84
B 0.5
C 1.6
D 0.62

Answer: 0.62
15 'Bar' is the unit of
A Temperature
B Heat
C Atmospheric pressure
D Current

Answer: Atmospheric pressure
16 Nautical mile is a unit of distance used in
A Navigation
B Road mile
C Astronomy
D Measuring the boundaries of a nation

Answer: Navigation
17 How many Dynes are there in 1 gram weight?
A 900
B 375
C 981
D 250

Answer: 981
18 Joule is the unit of
A Temperature
B Pressure
C Energy
D Heat

Answer: Energy
19 [ML-1T-2] is the dimensional formula of
A force
B coefficient of friction
C modulus of elasticity
D energy

Answer: modulus of elasticity
20 The dimensional formula of coefficient of viscosity is
A [MLT-1]
B [M-1L2T-2]
C [ML-1T -1]
D none of these

Answer: [ML-1T -1]

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