A small conducting spherical shell with inner radius a and outer radius b is con

Question

A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has a total charge of -2q and the outer shell has a total charge of +4q

Select True or False for the following statements.
True False  The total charge on the outer surface of the small shell is -2q.
True False  The total charge on the outer surface of the large shell is +2q.
True False  The electric field in the region r < a is zero.
True False  The total charge on the inner surface of the small shell is -2q.
True False  The electric field in the region c < r < d is zero.
True False  The electric field in the region r > d is zero.
True False  The total charge on the inner surface of the large shell is zero.

Explanation / Answer

1) The total charge on the outer surface of the small shell is -2q. TRUE

2) The total charge on the outer surface of the large shell is +2q.   FLASE

3) The electric field in the region r < a is zero     TRUE

4) The total charge on the inner surface of the small shell is -2q.   FALSE

5) The electric field in the region c < r < d is zero  TRUE

6) The electric field in the region r > d is zero.  FALSE

7) The total charge on the inner surface of the large shell is zero. FALSE

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