Question

Two point changes +q and -q are separated by distance d .A particular electric field line emanating from charge +q at an angle of 60° with horizontal line attains maximum in height h above line AB join charges +q and -q on horizontal plane. IF h = ((√x.)(d))/6, then find the value of x.

Answer 1

Using Figure we get:

$$d \sin 60° = h (1)$$

In our case,

$$h = \frac {\sqrt {x}}{6} (2)$$

We put (2) in (1):

$$d \sin 60° = \frac {\sqrt {x}}{6} (3)$$

Using (3) we get:

x=27

Answer

27