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Electrostatics

Good morning sir.
Electrical potential concept problem.
Explain it sir.

Question image for Good morning sir. Electrical potential concept pr

raju nagula

8 Years agoGrade

1 Answer

Eshan

8 Years ago

Dear student,

When the inner shell is grounded, it will attain charge so that its potential becomes zero.

Let the charge attained be $q$ . Potential of the shell due to charge on itself= $\dfrac{kq}{r}$ .

Potential of the sphere due to outer shell = $\dfrac{kQ}{2r}$

Hence total potential= $\dfrac{kq}{r}+\dfrac{kQ}{2r}=0$
$\implies q=-\dfrac{Q}{2}$

Hence +Q/2 must have flown from shell to ground so that its charge becomes -Q/2.

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