Question 911: Electrostats & Capacitance

Question

Two point charges $$-$$q and +q are placed at a distance of L, as shown in the figure.

The magnitude of electric field intensity at a distance R(R >> L) varies as:

Accepted Answer

For R >> L, arrangement is an electric dipole
$$E = {{2p} \over {4\pi {\varepsilon _0}{R^3}}}$$; where $$p = qL$$
$$E \propto {1 \over {{R_3}}}$$

Answer

$${1 \over {{R^2}}}$$

Answer

$${1 \over {{R^3}}}$$

Answer

$${1 \over {{R^4}}}$$

Answer

$${1 \over {{R^6}}}$$

Electrostats & Capacitance