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NEET 2011

Exam: NEET
Year: 2011
Subject: Physics
Chapter: Electrostatics

NEET 2011 · Physics · Electrostatics

Three charges, each +q , are placed at the corners of an isosceles...

Three charges, each

+q

, are placed at the corners of an isosceles triangle

A B C

of sides

B C

and

A C, 2 a . D

and

E

are the mid points of

B C

and

C A

. The work done in taking a charge

Q

from

D

to

E

is

Three charges, each +q , are placed at the corners of an isosceles triangle A B C of sides B C and A C, 2 a . D and E

Options

A $\frac{e q Q}{8 \pi \varepsilon_0 a}$
B $\frac{q Q}{4 \pi \varepsilon_0 a}$
Czero
D $\frac{3 q Q}{4 \pi \varepsilon_0 a}$

Correct answer

C. zero

Step-by-step solution

\text{ Here, }

A C=B C

Three charges, each +q , are placed at the corners of an isosceles triangle A B C of sides B C and A C, 2 a . D and E

\\

\begin{aligned}& V_D=V_E=V \\ & W=Q\left[V_E-V_D\right] \\ & W=Q[V-V] \\ & W=0 \end{aligned}

$

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