 # Category: Physics Mcqs

## Torque is defined as______________? A. Turning effect of force
B. Cross product of position vector and force
C. Product of force and moment arm
D. All A, B and C are correct

## Pair production takes place in the vicinity of a heavy nucleus so that_____________? A. Net energy is conserved
B. Net charge is conserved
C. Net momentum is conserved
D. All of the above

## Electrical energy is measured in___________________? A. watt
B. horse power
C. kilo watt
D. kilowatt hour

## The uncertainty in momentum & position is due to its_____________? A. Property of matter and radiation
B. Two-dimensional motion
C. Emission of the certain wavelength
D. Very high velocity

## If n number of the photon is striking on a metal surface then total momentum exerted is_______________? A. p
B. n
C. 0
D. None

## A particle having the mass of an electron and the charge of a proton is called a______________? A. Antiproton
B. Positron
C. Gamma rays
D. Photon

## A current carrying conductor is placed in a uniform magnetic field parallel to it. The magnetic force experienced by the conductor is _____________________? A. F=1/B
B. F=1/Bsinθ
C. F/0
D. F=1/Bcosθ

## Petrol engine is a________________? A. C.I engine
B. SI engine
C. IC engine
D. all the above

## When light incident normally on thin film the path difference depends upon ________________? A. thickness of the film only
B. nature of the film only
C. angle of indidence only
D. all thickness nature and angle of incidence

## If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________? A. Boyles law
B. Charles law
C. Ideal gas law