Question

The force, F, acting on a charged object varies inversely to the square of its distance, r, from another charged

Answer 1

Answer: Force will be approxmately 4.82 Newtons

Step-by-step explanation:

Step 1

letThe force, F, acting on a charged object which varies inversely to the square of its distance, r, from another charged be  given as

F ∝ I / r²

introducing the proportionality of constant,K we have

F ∝ I / r²

F =K I / r²

F= K/ r²

when the distance= 0.72, and force is 6.4 N, K will be

F= K/ r²

6.4N = K/ 0.72²

K= 6.4 X 0.72²

K=3.31776

step 2

when distance = 0.83, Force becomes

F= K/ r²

F= 3.31776/ 0.83²

F=4.82 Newtons