127. The disadvantage abase resistor method of transistor biasing is that it
A. is complicated
B. is sensitive to changes is fi
C. provides high stability
D. none of the above
128. The biasing circuit has a stability factor of 50. If due to temperature change, 1"0 change by 1 flA, then Ic will change by
A. 100 AA
B. 25 AA
C. 20 AA
D. 50 p,A
129. For good stabilisation in voltage divider bias, the current II flowing through R1 and R2 should be equal to or greater than
A. 10 IB
B. 3 IB
C. 2 IB
D. 4 IB
130. The leakage current in a silicon transistor is about the leakage current in a germanium transistor.
A. one hundredth
B. one tenth
C. one thousandth
D. one millionth
131. The operating point is also called the
A. cut off point
B. quiescent point
C. saturation point
D. none of the above
132. For proper amplification by a transistor circuit, the operating point should be located at of the d.c. load line.
A. the end point
B. middle
C. the maximum current point
D. none of the above
133. The operating point on the a.c. load line.
A. also lies
B. does not lie
C. may or may not lie
D. data insufficient
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