# Physics MCQs

a) True
b) False

## If an object is positively charged, theoretically the mass of the object ______

a) Increases slightly by a factor of 9.11*10-31 kg
b) Decreases slightly by a factor of 9.11*10-31 kg
c) Remains the same
d) May increase or decrease

## Why is gold used in the Gold-leaf electroscope?

a) Gold is easily available in nature
b) Gold is malleable
c) Gold is conducting in nature
d) Gold is cheap

## What happens to the plates of the apparatus if we measure alternating charge using a Gold-leaf oscilloscope?

a) It doesn’t diverge at all
b) It diverges momentarily
c) The plates give a proper divergence
d) The degree of divergence increases and decreases repeatedly

## Dr. Gilbert tried to hold a brass rod by hand and induce static electricity in it by friction. Why did he fail?

a) Static electricity is induced only on insulators while brass is conducting
b) The induced static charge flew through his hand and body to the ground
c) The static charge was not produced at all
d) It is not possible to induce static electricity by friction

## Gold-leaf electroscope can be used _______

a) Only to detect the presence of charge
b) To detect the presence of charge as well as its nature (positive or negative)
c) To measure the surface charge density
d) To measure current

a) 3*109
b) 3*108
c) 1.602*10-19
d) 2*109

a) 6.25*1021
b) 6.25*1020
c) 6.25*1025
d) 6.25*1023

## Two equally charged spheres attract each other. Now if they touch each other then they will _____

a) Attract each other with the same amount of force
b) Repel each other
c) Attract each other with less amount of force
d) Don’t attract or repel

## Which among the following cannot be the charge of a charged body?

a) 4.8*10-14 Coulomb
b) 6.4*10-15 Coulomb
c) 5*10-14 Coulomb
d) 3.2*10-10 Coulomb

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