If the electric potential of the inner metal sphere is $10$ $ volt$ $\&$ that of the outer shell is $5$ $volt$, then the potential at the centre will be ......$volt$
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$K\left(\frac{q_{1}}{b}+\frac{q_{2}}{a}\right)=10 v K\left(\frac{q_{1}}{b}+\frac{q_{2}}{a}\right)=5 v K\left(\frac{q_{1}+q_{2}}{b}\right)=?$ clearly
$V_{c}=10 V$
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