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Q. Electric potential at the centre of a charged hollow metal sphere is

J & K CETJ & K CET 2007Electrostatic Potential and Capacitance

Solution:

Electric potential of charged spherical shell
$V =\frac{q}{4 \pi \varepsilon_{0} R} [0 \leq r \leq R]$
$\therefore $ Electric potential at centre $=$ Electric potential on the surface