A thin spherical copper shell of radius $9.5 \mathrm {~cm}$ carries an excess charge of $- 4.2 \mathrm { nC }$. How many excess electrons are on (a) the outer surface of the shell, and (b) the inner surface? (e $= 1.60 \times 10 ^ { - 19 } \mathrm { C }$ )

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The Answer of A thin spherical copper shell of radius $9.5 \mathrm {~cm}$ carries an excess charge of $- 4.2 \mathrm { nC }$. How many excess electrons are on (a) the outer surface of the shell, and (b) the inner surface? (e $= 1.60 \times 10 ^ { - 19 } \mathrm { C }$ )

A Thin Spherical Copper Shell of Radius 9.5 cm9.5 \mathrm {~cm}9.5 cm Carries an Excess Charge Of

A Thin Spherical Copper Shell of Radius $9.5 \mathrm {~cm}$ Carries an Excess Charge Of