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 :

Question

Two point charges - q and + q are placed at a distance of L, as shown in the figure. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/37ca69f6a53fc2853c142939f2169f95-.png" /> The magnitude of electric field intensity at a distance R ( R > > L ) varies as : (A) (1/ R 6) (B) (1/ R 2) (C) (1/ R 3) (D) (1/ R 4)

Tardigrade Admin · Accepted Answer

It is electric dipole at large distance electric field intensity E=(K P/R3) √1+3 cos 2 θ ∴ E propto (1/R3)

Q. 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 :

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

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

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

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

It is electric dipole at large distance electric field intensity
$E = \frac{K P}{R ^{3}} 1 + 3 cos^{2} θ$
$∴ E \propto \frac{1}{R ^{3}}$

Q. 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 :

R61​

R21​

R31​

R41​