Some important units of physics.( পদাৰ্থ বিজ্ঞানৰ কিছুমান গুৰুত্বপূৰ্ণ একক )

                               Units         
            ( Previous Year  Paper solution.)
                   FOR ANY JOBS EXAM 

1) How many fundamental physical quantities are in SI system ?

Ans:- Seven.

2) The unit of the force is ___

Ans:- Newton.
3) Light-year is a unit  of ___
Ans:- Distance.
4) The unit of work is:
Ans:-  Joule.
5) What is the quantity of Electrostatic potential?
Ans:- Scalar quantity.
6) What is a reason why astronomical distances are measured in light-years?
Ans:- Speed of light is always same.
7) ' Parsec' is the unit measurement of
Ans:- Astronomical distance.
8) What is the unit of Planck constant?
Ans:- joule/second.
9) A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to---
Ans:- 3.25 light-years.
10) What is  the unit of the physical quantity of Momentum?
Ans:- Newton second.
11) What is the unit of measurement is multiplied by o.38 to convert it to ' inches'?
Ans:- Centimetre.
12) One light year is approximately equal to:
Ans:- 10¹⁶ m.
13) How can the height of a person who is six feet tall, be expressed ( approximately) in nanometre?
Ans:- 183 x 10⁷ nm.
14) Nuclear sizes are expressed in a unit named?
Ans:- Fermi.
15) 1 nanometre is equal to___
Ans:- 10⁻⁷ cm.
16) Ampere is the unit of:
Ans:- Current electricity.
17) What is measured  in hertz?
Ans:- Frequency.
18) What is the SI unit of Young's modulus of elasticity:
Ans:- Newton/m².
19) What is  the physical quantities has the same unit as that of pressure?
Ans:- Stress.
20) What is the SI unit of pressure:
Ans:- Pascal.
21) Angstrom is unit of
Ans:- Wavelength.
22) Decibel is the unit of:
Ans:- intensity.
23) ' Joule' is related to energy in the same way as ' Pascal' is related to
Ans:- Pressure.
24) What is the SI unit of electric charge ?
Ans:- Coulomb.
25) The unit of the force constant k of a spring is
Ans:- N/m.
26) One astronomical unit is the average distance between :
Ans:- Earth and the Sun.
27) What is the SI unit of temperature?
Ans:- Kelvin.
28) 1 Newton = ?
Ans:- 1kgms⁻².
29) The resistivity of a material may be expressed in unit of
Ans:- Ohm-cm or Ohm meter.
30) 1 pound =_______ounces.
Ans:- 16
31) The unit of momentum is
Ans:- kgms⁻¹.
32) The S.I unit of acceleration is
Ans:- ms⁻²
33) The unit for measurement of energy is
Ans:- Joule.
34) The SI unit of resistance is:
Ans:- Ohm.
35) What is the unit of Force ?
Ans:- Newton.
36) 1 kWh = ?
Ans:- 3.6  x 10⁶ J.
37) What is the represent Volt?
Ans:- Watt/Ampere.
38)  Potential is measured in:
Ans:- Joule/Coulomb.
39) The symbol of SI unit of inductance is H.It stands for
Ans:- Henry.
40) S.I unit of magnetic flux is :
Ans:- Weber.
41) Maxwell is the unit of
Ans:- Magnetic flux
42) What is the physical quantity has the same dimensions as that of Planck's constant h ?
Ans:- Angular momentum.
43) The SI unit of luminous emittance is
Ans:- Lux.
44) What is the same unit of Work?
Ans:- Energy.
45) The SI unit of radioactivity is......
Ans:- A Bacquerel.
46) The rate of change of momentum of a body is equal to the resultant:
Ans:- Force.
47) The SI unit of weight is
Ans:-  Newton.
48) The SI unit of mechanical or electric power is:
Ans:- Watt.
49) The SI unit for the average velocity is
Ans:- m/s.
50) What is the SI unit of Torque?
Ans:- Newton  meter.
51) Light year is 
Ans:- the distance travelled by light in free space in one year.
52) One nanometer is equal to....
Ans:-  10⁻⁹m.
53) A nautical mile is equal to....
Ans:- 1852 metres..
54) The relation between A⁰ and nm?
Ans:- 1nm=10A⁰.
55) The dimensional formula of angular velocity is
Ans:- M⁰L⁰T⁻¹.
56) The SI unit of weight is
Ans:- kilogram.
57) 1dyne (a unit of force in CGS system) equals to
Ans:- 10⁻⁵ kg-m/s²
58) What is the physical quantity of Electric current ?
Ans:- Fundamental.
59) Ampere is the unit of :
Ans:- Electric current.
60) Megawatt is the measuring unit of power which is __
Ans:- Generated.
61) One micron is equal to--
Ans:- 1/1000 mm.
62) One micron represents a length of---
Ans:- 10⁻⁴ cm.
63) A distance of 1 km means---
Ans:- 1000 m.
64) One pikogram is equal to---
Ans:- 10⁻¹² gram.
65) What is the unit of atmospheric pressure?
Ans:- Bar.
66) 1kg/cm² pressure is equivalent to:
Ans:- 1.0 bar.
67) 1 barrel of oil is equal to
Ans:- 159 litre.
68) The smallest unit of length is---
Ans:- Fermi meter.
69) What is measured in cusec ?
Ans:- Flow of water.
70) What is the unit of measure of the thickness of the ozone layer of the atmosphere ?
Ans:- Dobson.
71) What is most suitable unit to express the Nuclear Radius?
Ans:- Angstrom.
72) 1 Light Year is equal to ?
Ans:- 9.46x10¹² km.
73) One PARSEC is equal to
Ans:- 3.26 light years.
74) 1kg/cm² pressure is equivalent to ?
Ans:- 1.0 Bar.
75) What is the unit of Impulse?
Ans:- Newton/second.
76) One micron is equal to ?
Ans:- 10⁻⁶ m or 10⁻⁴ cm or 10⁻³ mm.
77) What type of unit are Radian and Steradian?
Ans:- Supplementary units.
78) What type of quantities are Plane Angle and Cube Angles?
Ans:- Supplementary Quantities.
79) Ampere-second is a SI unit of:
Ans:- Charge.
80) What is the unit of Angular Displacement?
Ans:- Radian.
81) By which unit is the mean distance between the Earth and the Sun expressed ?
Ans:- 1 Astronomical Unit.
82) The SI unit of Momentum of inertia is ?
Ans:- Kg-m².
83) The SI unit of Angular momentum is ?
Ans:- Kg.m²/sec.
84) The SI unit of Latent heat is ?
Ans:- Joule/kg.
85) The SI unit of Current density is ?
Ans:- Ampere/m².
86) The SI unit of Conductivity?
Ans:- Simmons/meter.
87) The SI unit of Capacity is ?
Ans:- Farad.
88) The SI unit of Boltzmann constant is ?
Ans:- Joule/Kelvin.
89) The SI unit of Viscosity coefficient is  ?
Ans:- Newton second/Meter².
90) The SI unit of Velocity slope is ?
Ans:- Per second.
91) The SI unit of Surface tension is ?
Ans:- Newton/Miters⁻².
92) The SI unit of Young's coefficient is?
Ans:- Newton/Meter².
93) The SI unit of Rotating radius is?
Ans:- Meter.
94) The SI unit of Gravitational potential is?
Ans:- Joule/kg.
95) The SI unit of Gravity constant is?
Ans:- Newton meter²/kg².
96) The SI unit of force moment is ?
Ans:- Newton/meter.
97) The SI Unit of Potential energy is?
Ans:- kg-m/² or Joule.
98) The SI unit of Volume is ?
Ans:- m³.
99) The SI unit of Area is?
Ans:- m².
100) The SI unit of Magnetic is:
Ans:- Tesla or weber/m².
101) The SI unit if Viscosity is:
Ans:- Newton-sec meter⁻².