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MCQs:-Physical quantities and their units

 Q.1)  What is the unit of mass in F.P.S system?

 A)  kg

 B) mg

 C) pound

 D) micron

 Ans:- C) Pound


 Q.2) What is the SI unit of light intensity?

 A) Candela

 B) Hertz

 C) decibels

 D) Kelvin

 Ans:- A) Candela


 Q.3)  What is the total number of basic units in SI system :-

 A) 5

 B) 7

 C) 9

 D)  8

 Ans:- B) 7


 Q.4) What is a light-year?:-

 A) unit of light

 B) unit of intensity of light

 C) unit of light wave

 D) unit of distance

 Ans:- D) Unit of distance


 

Q.5) Which of the following is not a basic unit unit?:-


 A) mole B) Kelvin

 C) ampere

 D) radians

 Ans:- D) Radian


 Q.6) Hertz is the SI unit of which of the following?:-

 A) wavelength

 B) Frequency

 C) Dimensions

 D) Displacement

 Ans:- B) Frequency


 Q.7)  Which of the following is the SI unit of weight?:-

 A)  kg

 B)  Pascal

 C) Newton

 D) kg-m

 Ans:- C) Newton


 Q.8) What is the SI unit of measuring temperature?:-

 A) degree

 B) Kelvin

 C) Fahrenheit

 D) none of these

 Ans:- B) Kelvin


 Q.9) Which of all following represents the unit of momentum?:-

 A) kgm/s²

 B) ms²/kg

 C) kgm/s

 D) ms/kg

 Ans:- C) kgm/s


 Q.10) What is the wavelength of a wave measured in? :-

 A) Meter

 B) Hertz

 C) Angstrom

 D)  nanometer

 Ans:- A) Meter


 Q.12) What is the SI unit of resistivity of a conductor?:-

 A) ohm(Ω)

 B) Ohm-meter

 C) Voltage

 D) Ampere- Meter

 Ans:- B) Ohm-meter


 Q.13) What is the unit of mass in c.g.s system?:-

 A) Centigram

 B) kilogram

 C) gram

 D) mg

 Ans:- C) gram


 Q.14) What is 1 Pascal equal to? :-

 A) Nm

 B) Nm²

 C) N/m

 D) N/m²

 Ans:- D) N/m²


 Q.15) What is the SI unit of magnetic field?:-

 A)  Weber

 B) Tesla

 C) ampere/m

 D) volt

 Ans:- B) Tesla


 Q.16) Which of the following is the SI unit of magnetic flux?:-

 A) Tesla

 B) Maxwell

 C) Henry

 D)  Weber

 Ans:- D) Weber


 Q.17) Parsec is the unit of which of the following?:-

 A) angular acceleration

 B) Frequency

 C) distance

 D) magnetic wave

 Ans:- C) Distance


 Q.18) Which of the following represents the unit of potential difference?:-

 A) coulomb/joule

 B) joule / coulomb

 C) joule²/coulomb

 D) joule-coulomb

 Ans:- B) Joule / Coulomb (Note:- Potential difference = work / charge)


 Q.19) Which of the following is not a vector quantity? :-

 A) Kinetic Energy

 B) Momentum

 C) Acceleration

 D) Velocity

 Ans:- A) Kinetic Energy


 Q.20) Which of the following is not a scalar quantity?:-

 A) Work

 B) mass

 C) Displacement

 D)  potential energy

 Ans:- C) Displacement


 Q.21) What is the unit of universal gravitational constant G?:-

 A) Nm/kg²

 B) Nkg/m

 C) kgm/N

 D) Nm²/kg²

 Ans:- D) Nm²/kg²


 Q.22) Which of the following is the average distance between the Earth and the Sun?:-

 A) astronomical units

 B) light-year

 C) parsec

 D) 1000 miles

 Ans:- A) Astronomical Unit


 Q.23) The unit of distance in M.K.S system is?:-

 A) millimeter

 B) kilometer

 C) mile

 D) meter

 Ans:- D) Meter


 Q.24) Which of the following is the largest unit of distance?:-

 A)  astronomical units

 B) parsec

 C) light-year

 D) miles

 Ans:- B) Parsec


 Q.25) What is the SI  unit of wavelength of light?:-

 A) Angstrom

 B) nanometer

 C) Meter

 D)  millimeter

 Ans:- A) Angstrom


 Q.26)  What is the SI unit of heat?:-

 A) Watt

 B) Kelvin

 C) Joule

 D) Fahrenheit

 Ans:- C) Joule


 Q.27) How many days are there in leap year? :-

 A) 364 days

 B) 365 days

 C) 366 days

 D) 367 days

 Ans:- C) 366 days


 Q.28) Which of the following is the SI unit of angle?:-

 A) degree

 B)  radians

 C) Kelvin

 D) ohm

 Ans:- B)  Radian


 Q.29) How many gallons are there in 1 liter? :-

 A) 2.642 gallons

 B) 0.365 gallons

 C) 1.063 gallons

 D) 0.2642 gallons

 Ans:- D) 0.2642 Gallon


 Q.30) What is the quantity of a substance expressed in? :-

 A) kilogram

 B) mole

 C) pound

 D) liter

 Ans:- B)  Mole


 Q.31) 1 mile is equal to how many kilometer? :-

 A)  1.609 kms

 B) 1000 kms

 C) 100 km

 D) 2.50 kms

 Ans:- A) 1.609 Kilometers


 Q.32) 1 micron is equal to how many meters? :-

 A) 10¹² m

 B) 10⁹ m

 C) 10-⁶ m

 D) 10⁷ m

 Ans:- C) 10-⁶ m


 Q.33) What is the SI  unit of heat?:-

 A)  Joule

 B) Kelvin

 C)  joule-second

 D) Calories

 Ans:- A) Joule


 Q.34) What is the SI unit of power? :-

 A)  Joule

 B) Watt

 C) Newton

 D) joule/second²

 Ans:- B) Watt


 Q.35) Sound intensity is measured in:-

 A) Lumen

 B) Hertz

 C) MAC number

 D)  decibel

 Ans:- D) Decibel


 Q.36) What is the unit of force in c.g.s method?:-

 A) Newton

 B) Watt-second

 C)  Dyne

 D) joule-second

 Ans:- C) Dyne


 Q.37) What is the unit of power in c.g.s measurement system?:-

 A) Watt

 B) Horse-power(H.P)

 C)  joule/second

 D) Arg

 Ans:- B) Horse Power( H.P)


 Q.38) In which unit energy is measured in c.g.s method?:-

 A) Joule

 B) Newton

 C) electron volt

 D) erg

 Ans:- D) erg


 Q.39) 1 parsec is equal to how many light years? :-

 A) 3.26 light years

 B) 1.59 light years

 C) 2.22 light years

 D) 4.50 light years

 Ans:- A) 3.26 light years


 Q.40)  How many centimeters are there in 1 meter?:-

 A) 10  centimeters

 B) 1000 cm

 C) 500  centimeters

 D) 100  centimeters

 Ans:- D) 100 cm


 Q.41) 1 light year is equal to which of the following? :-

 A) 10 × 10¹² m

 B) 12 × 10¹⁵ m

 C) 9.46 × 10¹⁵ m

 D) 8.73 × 10¹⁵ m

 Ans:- C) 9.46 ×10¹⁵ m


 Q.42) Which of the following is the unit of flame flux?:-

 A) Candela

 B) lumen

 C) Roentgen

 D) Maxwell

 Ans:- B) Lumen


 Q.43) How many centimeters are there in 1 inch?:-

 A) 3.59 cm

 B) 10 cm

 C) 2.54 cm

 D) 5.31 cm

 Ans:- C) 2.54 cm


 Q.44) How many meters are there in 1 nanometer?:-

 A) 10-⁸ m

 B) 10-¹⁰ m

 C) 10-¹² m

 D) 10-⁹ m

 Ans:- D) 10-⁹ m


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