A point charge q1 is concentric with two spherical conducting thick shells. The

Question

A point charge q1 is concentric with two spherical conducting thick shells. The smaller spherical conducting shell has a net charge of q2 and the larger spherical conducting shell has a net charge of q3. What is the charge on the inner surface of the larger spherical conducting shell? Under static conditions, the charge on a conductor resides on the surface of the conductor

1.Q3 = +q1

2. Q3 = -q1

3. Q3 = +q1+q2+q3

4. Q3 = -q1-q2-q3

5.Q3 = +q1+q2

6. Q3 = -q1-q2

7. Q3 = -q1+q2

8. Q3 = 0

9. Q3 = +q1 -q2

10. Q3 = -q1-q2+q3

Explanation / Answer

Under static conditions, the charge on a conductor resides on surface of the conductor.

The charge on an inner surface of the larger spherical conducting shell will be given as :

At q = q'3, we have

(6) Q3 = - q1 - q2

option (6) : it is correct.

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