The conventional current is in a direction …………… the direction of motion of electrons.

1. parallel
2. normal
3. opposite
4. none of the above

Insulators have ……………electrons and conductors have …………… electrons.

1. no free, large number of free
2. large number of free, no free
3. no free, small number of free
4. small number of free, no free

Select the best insulator among the following

1. Pure water
2. Human body
3. Aluminium
4. Mercury

A conductor having an excess of electrons is said to be at …………… potential while a conductor having a deficit of electrons is at ………….. potential.

1. lower, lower
2. lower, higher
3. higher, lower
4. higher, higher