A spherical conducting shell has charge Q. A particle with charge q is placed at the center of the cavity. The charge on the inner surface of the shell and the charge on the outer surface of the shell, respectively, are:
A: 0, Q
B: q, Q −q
C: Q, 0
D: −q, Q + q
E: −q, 0
A: 0, Q
B: q, Q −q
C: Q, 0
D: −q, Q + q
E: −q, 0
举一反三
- A point charge q is placed inside a cavity within a conductor. The conductor is electrically neutral and is isolated . The total charge on the outer surface of the conductor must be ______.
- 对于基本RS触发器来说,RS=01时,则( )。 A: Q=0,非Q=1 B: Q=0,非Q=0 C: Q=1,非Q=1 D: Q=1,非Q=0
- 与非门构成的基本RS触发器的输入S=0,R=0时,其输出状态为()。 A: Q=0,Q=1 B: Q=1,Q=0 C: Q=1,Q=1 D: Q=0,Q=0 E: 状态不确定
- 与非门构成的SR锁存器的输入S=0,R=0时,其输出状态为()。 A: Q=0,Q’=1 B: Q=1,Q’=0 C: Q=1,Q’=1 D: Q=0,Q’=0
- 由与非门构成的基本RS触发器当R’=1,S’=0时,触发器状态为( ) 。 A: Q=1,Q’=0 B: Q=0,Q’=1 C: Q=1,Q’=1 D: Q=0,Q’=0