71. The base of a transistor is ____ doped
A. heavily
B. moderately
C. lightly
D. none of the above

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72. The element that has the biggest size in a transistor is
A. collector
B. base
C. emitter
D. collector-base junction

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73. In a pnp transistor, the current carriers are
A. acceptor ions
B. donor ions
C. free electrons
D. holes

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74. The collector of a transistor is doped.
A. heavily
B. moderately
C. lightly
D. none of the above

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75. A transistor is a operated device
A. current
B. voltage
C. both voltage and current
D. none of the above

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76. In an npn transistor, are the minority carriers.
A. free electrons
B. holes
C. donor ions
D. acceptor ions

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77. The emitter of a transistor is doped.
A. lightly
B. heavily
C. moderately
D. none of the above

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