Question

17. One coulomb is that unit of charge which
when placed at 1 m form an equal and
similar unit charge repels it with a force?
a. 5 x 10^9 dyne
b. 5 x 109 N
c. 9 x 10^9 dyne
d. 9 x 10^9N

The answer is (d)
EXPLAIN ME HOW.​

Answer 1

Answer:

F=kq2÷r2

F=9×10^9×(1)^2÷(1)2

F=9×10^9N

Answer 2

Answer:

D) 9 × 10^9 N

Explanation:

F = (KQ1×Q2)/R^2

Here , k = 9 × 10^9 (fixed value of k)

Q1, Q2 = 1 coulumb each

r = 1 ( distance bw charges)

so it is F = (9 × 10^9 × 1 ×1)/ 1^2

F = 9 × 10^9 N

Thanks....