Two point charges repel eachother with a force of 4*10^-5 N at a distance of 1m . Id the distance between them is increased to 2 m. The force of repulsion will be ? In N ?
A.1*10^-5
B.2*10^-5
C.4*10^-5
D.8*10^-5
E.16*10^-5
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Option A is correct
because
Force is inversly proportional to r^2
where r is distance between charges
if r becomes 2r then after squaring it becomes 4 times and Force will REDUCE 4
TIMES
=4×10^-5/4
=1×10^-5N
because
Force is inversly proportional to r^2
where r is distance between charges
if r becomes 2r then after squaring it becomes 4 times and Force will REDUCE 4
TIMES
=4×10^-5/4
=1×10^-5N
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