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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEP
Chapter: Electrostatics

Olympiad workbook · NSEP · Electrostatics

Three point charges +q,-2 q and +q are placed on x- axis at x=-d,...

Three point charges

+\mathrm{q},-2 \mathrm{q}

and +q are placed on

\mathrm{x}-

axis at

\mathrm{x}=-\mathrm{d}, \mathrm{x}=0

and

\mathrm{x}=+\mathrm{d}

respectively. The value of electric field at a point

P

on

x

axis at

x=r(r \gg d)

is given by

E=\frac{1}{4 \pi \varepsilon_0} \frac{a Q}{r^a} \left(H e r e Q=2 q d^2\right)

Then

Options

A $a=3, n=3$
B $a=6, n=4$
C $a=3, n=4$
D $\mathrm{a}=\frac{3}{2}, \mathrm{n}=4$

Correct answer

C. $a=3, n=4$

Step-by-step solution

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