The insulator is
Cu
Silk
Acidulated water
Human body
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
Elementary charge or fundamental unit of charge is the charge of
electron
proton
neutron
none of these
An ammeter is connected in a circuit in
Series
Parallel
Either in series or in parallel
None of these
The device used to detect the presence of very weak current in the circuit.
Ammeter
Voltmeter
Galvanometer
Rheostat
The electrons which are in orbits close to the nucleus are called
bound electrons
valence electrons
free electrons
The approximate duration of lightning is
105sec
10-5 sec
103sec
10-3 sec
The electrons of the outer most orbit are called
positive ions
Which of the following is positively charged?
