Question

Three charges +49, Q and q are placed in a straight line of length l at points 0,
and l respectively. What should be Q in order to make
net force on q to be zero?​

Answer 1

Answer:

hey

Explanation:

Better take Q as positive

Since like charges repel

also

for like charges ,null point is formed between them.

Null point refers to net force acting on it is zero

hope it helps