Two uncharged bodies on rubbing get charged because of
conduction
friction
induction
none of these
A gold leaf electroscope can
only detect the presence of charge
only test the kind of charge
only measure the charge
detect the presence of charge and test the kind of charge
A lightning conductor is made up of
copper
glass
ebonite
wood
When length of wire increases resistance,
increases
decreases
become zero
no change
SI unit of current
volt
Joule
Ampere
None of these
In a gold leaf electroscope, its stem is made up of
brass
The mass of an electron is nearly ___ times the mass of proton
At small distance from the earth the colour of lightning is
white
pink
violet
