96. In a transistor, signal is transferred from a ………… circuit.
(a) high resistance to low resistance
(b) low resistance to high resistance
(c) high resistance to high resistance
(d) low resistance to low resistance
97. The arrow in the symbol of a transistor indicates the direction of ………
(a) electron current in the emitter
(b) electron current in the collector
(c) hole current in the emitter
(d) donor ion current
98. The leakage current in CE arrangement is ……. that in CB arrangement.
(a) more than
(b) less than
(c) the same as
(d) none of the above
99. A heat sink is generally used with a transistor to ……..
(a) increase the forward current
(b) decrease the forward current
(c) compensate for excessive doping
(d) prevent excessive temperature rise
100. The most commonly used semiconductor in the manufacture of a transistor is ……..
(a) germanium
(b) silicon
(c) carbon
(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)…