A large insulated sphere of radius r charged with q units of el-Turito

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Physics-

General

Easy

Question

A large insulated sphere of radius r charged with Q units of electricity is placed in contact with a small insulated uncharged sphere of radius r and in then separated. The charge on smaller sphere will now be

$Q (r + r^{'})$
$\frac{Q r^{'}}{r^{'} + r}$
$Q (r - r^{'})$
$\frac{Q}{r^{'} + r}$

The correct answer is: $fraction numerator Q r to the power of straight prime over denominator r to the power of straight prime plus r end fraction$

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