NEET Physics Unit of Physical Quantities MCQs Set A

a) 0.9144 metre

b) 1.0936 kilometre

c) 0.09144 kilometre

d) 1.9144 metre

Answer: 0.9144 metre

Question: Which one of the following pairs of quantities and their units is a proper match?

a) Magnetic flux – weber

b) Capacitance – henry

c) Impulse – N/sec

d) Power – farad

Answer: Magnetic flux – weber

Question: One second is defined to be equal to

a) 9192631770 periods of the cesium clock

b) 1650763.73 periods of the cesium clock

c) 652189.63 periods of the krypton clock

d) 1650763.73 periods of the krypton clock

Answer: 9192631770 periods of the cesium clock

Question: One pico farad is equal to

a) 10^–12 farad

b) 10^–24 farad

c) 10^–18 farad

d) 10^–6 farad

Answer: 10^–12 farad

Question: ‘Torr’ is the unit of

a) pressure

b) volume

c) density

d) flux

Answer:  pressure

Question: Very large distances such as the distance of a Planet or a star from Earth can be measured by

a) Parallax method

b) All of these

c) Millikan’s oil drop method

d) Spectrograph

Answer: Parallax method

Question: Joule second is a unit of

a) angular momentum

b) torque

c) energy

d) power

Answer: angular momentum

Question: Temperature can be expressed as derived quantity in terms of

a) None of these

b) mass and time

c) length and mass

d) length, mass and time

Answer: None of these

Question: One unified atomic mass unit is equal to

a)

b)

c) 12 times the mass of one carbon-12 atom

d) 12 times the mass of 12 atoms of C-12

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:  Light year is

a) the distance travelled by light in free space in one year

b) time taken by earth to go once around the sun.

c) time taken by light to travel from sun to earth

d) light emitted by the sun in one year.

Answer: the distance travelled by light in free space in one year

More Questions.............................................

Question: The unit of the coefficient of viscosity in S.I. system is

a) kg/m-s

b) kg/m-s²

c) m-s/kg²

d) m/kg-s

Answer: kg/m-s

Question: The unit of the Stefan-Boltzmann's constant is

a) W/m²K⁴

b) W/m²

c) W/m²K

d) W/m²K²

Answer: W/m²K⁴

Question: The wrong unit conversion among the following is

a) 1 astronomical unit = 1.496 × 10^–11m

b) 1 light year = 9.46 × 10¹⁵m

c) 1 fermi = 10^–15m

d) 1 angstrom = 10^–10m

Answer: 1 astronomical unit = 1.496 × 10^–11m

Question: Unit of specific resistance is

a) ohm – m

b) ohm/m

c) ohm m³

d) ohm/m²

Answer: ohm – m

Question:  Unit of magnetic moment is

a) ampere–metre²

b) weber–metre²

c) ampere–metre

d) weber/metre

Answer:  ampere–metre²

Question:  Surface tension of a liquid is 70 dyne/cm. Its value in SI is

a) 7 × 10^–2 N/m

b) 7 × 10³ N/m

c) 7 × 10² N/m

d) 70 N/m

Answer: 7 × 10^–2 N/m

Question: Assertion : When we change the unit of measurement of a quantity, its numerical value changes.
Reason : Smaller the unit of measurement smaller is its numerical value.

a) Assertion is correct, reason is incorrect

b) Assertion is incorrect, reason is correct

c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer:  Assertion is correct, reason is incorrect

Question:

a) dA/r² steradian

b) dA/r steradian

c)

d) r²dA steradian

Answer:  dA/r² steradian

Question:

a)

b)

c)

d)

Answer:

Question:  Which of the following represents incorrect unit?

a) Energy = kg-m/sec

b) Pressure = N/m²

c) Surface tension = N/m

d) None of these

Answer: Energy = kg-m/sec

Question: Which of the following is the unit of molar gas constant?

a) JK^–1 mol^–1

b) Joule

c) JK^–1

d) J mol^–1

Answer: JK^–1 mol^–1

Question: Number of fundamental units in SI system is

a) 7

b) 3

c) 5

d) 4

Answer: 7

Question:  Consider the following statements and select the correct statement(s).

a) I, II and III

b) I only

c) III and IV

d) IV only

Answer: I, II and III

Question: Which one of the following is not measured in units of energy ?

a) Impulse × time

b) Force × distance

c) Moment of inertia × (angular velocity)²

d) Couple × angle

Answer: Impulse × time

Question:  The numerical values of young's modulus in S.I. unit is b. What is its numerical value in cgs system?

a)

b)

c)

d)

Answer:

Question:

a) dyne × cm⁴

b) dyne × cm²

c) dyne × cm⁵

d) dyne/cm³

Answer:  dyne × cm⁴

Question:

a) N²

b) Ns

c) N²s

d) N

Answer: N²

Question: If x = at + bt², where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is

a) km/s²

b) kms²

c) kms

d) km/s

Answer:  km/s²

Question:

a) kms²

b) km/s²

c) kms

d) km/s

Answer:  kms²

Question:

a)

b)

c)

d)

Answer:

Question:  E, m, J and G denote energy, mass, angular momentum and gravitational constant respectively, then the unit of

a) second

b) kilogram

c) metre

d) newton

Answer: second

Question:  The correct unit of thermal conductivity is

a)

b)

c)

d)

Answer:

Question: If unit of length and force are increased 4 times. The unit of energy

a) is increased by 16 times

b) is increased by 8 times

c) remains unchanged

d) is increased by 4 times

Answer:  is increased by 16 times