MCQ on Unit, length, mass, time in Physics, Multiple Choice Questions on Units and Dimension in Physics with answers

Following are the Multiple Choice Questions(MCQ) on Unit and Dimensions like, length, mass and time. I have provided questions for all most all the fundamental as well as derived units and physical quantity. You will also find questions on light year, cgs units and SI Units

Ques 1 Parsec is equal to

a) 3.42 light year

b) 3.33 light year

c) 3.26 light year

d) 3.68 light year

answer c

Ques 2: SI Unit of Electric Current is
a) Volt
b) Ampere
c) Ohm
d)Watt
answer b



Ques 3: 1 Lunar Month is equal to 
a) 27.3 solar days
b) 27.7 solar days
c) 22.3 solar days
d) 25.5 solar days
answer a

Ques 4: 1 Atomic mass is equal to 
a) 1.23 X 10^-27
b) 1.26 X 10^-23

c) 1.66 X 10^-27

d) 1.66 X 10^-23
answer c

Ques 5: 1 Angstrom is equal to 
a) 100^-10 m
b) 10^-10 cm
c) 1000^-10 mm
d) 1^-10 m
answer b

Ques 6: SI Unit of Force is

a) Newton
b) joule
c) dyne
d) erg
Answer a

Ques 7: 1 Quintal is equal to
a) 100 kg
b) 10000 kg
c) 10 kg
d) 200 kg
answer a

Ques 8: Types of Units are
a) Fundamental Units
b) Derived Units
c) SI Units
d) CGS
Answer a and b

Ques 9: 1 Metric ton is equal to 
a) 100 kg
b) 10000 kg
c) 10 kg
d) 200 kg
answer b

Ques 10: 1 Sung is equal to 
a) 13.25 kg
b) 14.59 kg
c) 14.67 kg
d) 15.42 kg
answer b

Ques 11: 1 Pound is equal to 
a) 0.4537 kg
b) 0.4423 kg
c) 0.4122 kg
d) 0.4000 kg
answer a

Ques 12: 1 Chandrashekhar limit is equal to 
a) 1.4 times the mass of sun
b) 2 times the mass of sun
c) 2.5 times the sun
d) 2.2 mass of the sun
answer: a

Ques 13: SI Unit of Work is 
a) Newton
b) joule
c) dyne
d) erg
 Answer d

Ques 14: 1 Solar day is equal to 
a) 86500 second
b) 84400 second
c) 88440 second
d) 86400 second
answer d

Ques 15: 1 micron is equal to 
a) 10^ -8 cm
b) 10^ -6 m
c) 10^ -6 cm
d) 10^ -4 m

answer a and b

Ques 16: 1 Nautical mile is equal to 

a) 1 Sea mile

b) 6000 ft

c) 6020 ft

d) 5000 ft

answer c

Ques 17: SI Unit of Length is
a) meter
b) kilogram
c) centimeter
d) millimeter
answer a

Ques 18: 1 Astronomical unit is equal to 

a) 1.5 X 10 ^ 11 m

b) 1.2 X 10 ^ 11 cm

c) 1.1 X 10 ^ 11 m

d) 1.4 X 10 ^ 11 mm

answer a

Ques 19: SI Unit of time is

a) Second

b) Minute

c) Millisecond

d) Hour

answer a

Ques 20: CGS Unit of work is

a) Dyne

b) Erg

c) newton 

d) joule

answer b