Question

there is a torus of outer radii 4000M and inner radii 2000M. how much population can this torus have. approx one person needs 100m square.....

Answer 1

Answer:

Here distance between a and +q= distance between C and −q=y

1

(say);

distance between a and −q= distance between C and +q=y

2

similarly , d(+q)=d(−q)=b(−q)=b(+q)=r (say)

Thus , V

a

=

y

1

kq

+

y

2

−kq

V

b

=

r

kq

+

r

−kq

=0

V

c

=

y

2

kq

+

y

1

−kq

V

d

=

r

kq

+

r

−kq

=0

Since y

2

>y

1

, V

a

is positive V

c

is negative.

Thus V

a

>V

b

=V

d

>V