Ans:- The electric intensity at a point in the electric field is defined as the force which is experienced by unit positive charge placed at that point.
if the charge q experiences an electric force F then electric intensity
E=F/q
Equipotential surface - If a draw a surface in such a way that the electric potential is the same at all the points of the surface,it is called an equipotential surface.
Write two main features of LASER rays.
Ans:- Two main features of LASER rays:
(i) The laser light is almost perfectly monochromatic,highly temporally cohrent.
(ii) The laser rays are almost perfectly parallel.Hence a laser beam is very narrow and can travel to long distance without spreading.
Two condenser have capacitances C1 and C2.Show their parallel combination and series combination circuits.
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