Question

The figure given below shows four arrangements
of charged particles, all at the same distance from
the origin. Rank the situation according to the
net electric potential (V₁, V₂, V₃, V₄) at the origin, most positive first :
(a) V₁ > V₂ > V₃ > V₄ (b) V₂ > V₁ > V₃ > V₄
(c) V₂ > V₁ > V₄ > V₃ (d) V₄ > V₁ > V₃ > V₂

Answer 1

Given:

The distance r

The velocity of particle V₁,V₂,V₃,V₄

To find:

The rank of the velocity.

Solution;

The velocity in V₁

V₁=k(2q/r - 9q/r)=-7q/r

V₂=k(-2q/r-3q/r)=-5q/r

V₃=k(-2q/r-2q/r-3q/r-2q/r)=-9q/r

V₄=k(-6q/r+q/r-5q/r+2q/r)=-8q/r

So the rank of the situation is V₂>V₁>V₄>V₃

So the option C is correct.

Answer 2

Explanation:

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