two charges when 10 cm apart atract each other woth a force of newton five cm apart these masses attract each other with a force of?
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Answer:
Initial force,
F=k
r
2
900×10
−12
N
After keeping in contact, due to induction;
q
A
=−40μC
q
B
=−40μC
So, new force;
F
′
=k
r
2
1600×10
−12
N
F
F
′
=
900
1600
F
′
=
9
16 F
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