Question

Two point charges 4 microC and -8microC are placed at a distance 1.5m. Total number of points except infinity where potential due to system of charges is zero are-

a) 1
b)2
c)3
d) infinity

Answer 1

#A.) 1

hope it helps you out dude

Answer 2

Answer:

option a).1

Explanation:

refer image attached for assumptions,

$\frac{1}{4\pi \: e \: o} \times \frac{4 \times {10}^{ - 6} }{x} + \frac{1}{4\pi \: eo} \times \frac{ - 8 \times {10}^{ - 6} }{1 - x} = 0 \\ \: implies\frac{4}{x} + \frac{- 8}{1.5 - x} = 0 \\ \frac{1}{x} - \frac{2}{1.5 - x} = 0 \\ \frac{(1.5 - x) -2 x }{x(1.5 - x)} = 0 \\implies \\ 1.5x - x- 2x = 0 \\ 1.5 - 3x = 0 \\ \frac{3}{2} = 3x \\ x = \frac{3}{2 \times 3} \\ x = \frac{1}{2} .$

$1.5 = 3x \\ \frac{3}{2 \times 3} = x \\ \frac{1}{2} = x.$

therfore option a )1.

#SPJ2.