134. The disadvantage of voltage divider bias is that it has
A. high stability factor
B. low base current
C. many resistors
D. none of the above

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135. Thermal runaway occurs when
A. collector is reverse biased
B. transistor is not biased
C. emitter is forward biased
D. junction capacitance is high

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136. The purpose of resistance in the emitter circuit of a transistor amplifier is to
A. limit the maximum emitter current
B. provide base-emitter bias
C. limit the change in emitter current
D. none of the above

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137. In a transistor amplifier circuit, VCE = VCB +___
A. VBE
B. 2 VBE
C. 1.5 VBE
D. none of the above

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138. Thebase resistor method is generally used in
A. amplifier circuits
B. switching circuits
C. rectifier circuits
D. none of the above

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139. For germanium transistor amplifier, VCE should for faithful amplification.
A. be zero
B. be 0.2 V
C. not fall below 0.7 V
D. none of the above

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140.  In a base resistor method, if the value of 13 changes by 50, then collector current will change by a factor of
A.25
B.50
C.100
D.200

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