76. In a transistor if β= 100 and collector current is 10 mA, then IE is ……..
(a) 100 mA
(b) 100.1 mA
(c) 110 mA
(d) none of the above
77. The relation between β and Ω is …………
(a) β=1/(1-α)
(b) β=(1-α)/α
(c) β=α/(1-α)
(d) beta;=alpha;/(1+alpha;)
78. The value of β for a transistor is generally ……..
(a) 1
(b) less than 1
(c) between 20 and 500
(d) above 500
79. The most commonly used transistor arrangement is …….. arrangement.
(a) common emitter
(b) common base
(c) common collector
(d) none of the above
80. The input impedance of a transistor connected in ………. arrangement is the highest.
(a) common emitter
(b) common collector
(c) common base
(d) none of the above
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Transistors » Exercise - 1 1. A transistor acts as a : (a) Diode and voltage source (b) Diode and current source (c) Diode and power supply (d) Diode and resistance 2. The free electrons recombine with a hole in the base region of a transistor to become : (a) Free electrons (b) Valence electrons (c) Atom (d) Majority carrier 3. Transistor is a : (a) current controlled current device (b) current controlled voltage device (c) voltage controlled current device (d) voltage controlled voltage device 4. ICBO in a transistor can be reduced by : (a) Reducing IB (b) Reducing VCC (c) Reducing IE (d) Reducing the temperature 5. The base current of a transistor is typically : (a) Less than emitter current (b) Greater than emitter current (c) Same as emitter current (d) Equal to the sum of emitter and collector currents 6. The current gain of a transistor is : (a) The ratio of collector current to emitter current (b) The ratio of collector current to base current (c) The ratio of base current to collector current (d) The ratio of emitter current to collector current 7. The most commonly used configuration of transistor as switch is : (a) CB (b) CC (c) CE (d) CB or CC 8. When an N-P-N transistor is used as an amplifier then : (a)…