Two spheres carrying charges +6uc and+9uc separated by distance d experience a force of repulsion F.When a charge of -3uc is given to both the sphere and kept at the same distance as before the new force od repulsion is

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Solution

Dear student,
the force of repulsion is given by
F=kQ1 Q2/r²
=k54/r²
Q1=6uc
Q2=9uc
On addition of -3uc the charges become
Q1=3uc
Q2=6uc
Now force will be
=k18/r

=F/3.
so answer is F/3.
Thank you

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Two spheres carrying charges +6uc and+9uc separated by distance d experience a force of repulsion F.When a charge of -3uc is given to both the sphere and kept at the same distance as before the new force od repulsion is

Dear student, the force of repulsion is given by ​​​​F=kQ1 Q2/r² =k54/r² Q1=6uc Q2=9uc On addition of -3uc the charges become Q1=3uc Q2=6uc Now force will be =k18/r =F/3. so answer is F/3. Thank you

Dear student,
the force of repulsion is given by
F=kQ1 Q2/r²
=k54/r²
Q1=6uc
Q2=9uc
On addition of -3uc the charges become
Q1=3uc
Q2=6uc
Now force will be
=k18/r

=F/3.
so answer is F/3.
Thank you