When a positive charge of 2 coulombs is placed at a point in
an electric field, it experiences a force of 6N. The intensity of electric
field at this point is:
To protect the gold leaves of electroscope from the external
electric disturbances, the aluminum foil is grounded by a thin wire, which is
made up of:
If the distance between two point charges is reduced to
half, the coulomb’s force become:
Which instrument is used to measure current, resistance and
potential difference: