Question

An infinite number of charges, each of charge luc are
placed on the x-axis with co-ordinates
x=1,2,4,8...x If a charge of 1C is kept at the origin
then what is the net force acting on 1C charge​

Answer 1

Answer:

F=

4π∈

0

1

Σ

r

2

ij

qiqj

=9×10

9

×10

−6

[1+

4

1

+

16

1

+

64

1

......]

=9×10

3

⎣

⎢

⎢

⎡

1−

4

1

1

⎦

⎥

⎥

⎤

=9×10

3

×

3

4

=12000N

{∵Sumof∝G.P=(

1−r

a

)}

solution