Top Most Electronics Objective Questions Part – 3
1. An ideal diode resistance has———resistance during forward biasing
(a) Zero
(b) Unity
(c) Maximum
(d) Minimum
Ans:a
2. Transistor is used as
(a) Switch
(b) Amplifier
(c) Both (a) & (b)
(d) None of these
Ans:c
3. Majority carriers of N type material
(a) Electrons
(b) Holes
(c) Protons
(d) None of these
Ans:a
4. Which one is semiconductor
(a) Copper
(b) Mica
(c) Carbon
(d) Silicon
Ans:d
5. Transistor is ———–Device
(a) Bipolar
(b) Unipolar
(c) Constant current
(d) Constant voltage
Ans:a
6. Diode is used as
(a) Regulator
(b) Inverter
(c) Current Regulator
(d) Rectifier
Ans:d
7. Zener diode acts as
(a) Rectifier
(b) Regulator
(c) Inverter
(d) None of these
Ans:b
8. Diode is ———–Device
(a) Bipolar
(b) Unipolar
(c) Constant current
(d) Constant voltage
Ans:b
9. Which one is intrinsic semiconductor
(a) Copper
(b) Mica
(c) Carbon
(d) Silicon
Ans:d
10. Which one is conductor
(a) Copper
(b) Mica
(c) Carbon
(d) Silicon
Ans:a
11. Which one is insulator
(a) Copper
(b) Mica
(c) Carbon
(d) Silicon
Ans:b
12. Ripple factor for half wave rectifier
(a) 1.11
(b) 1.21
(c) 1.5
(d) 0.48
Ans:b
13. Ripple factor for full wave rectifier
(a) 1.11
(b) 1.21
(c) 1.5
(d) 0.48
Ans:d
14. Ripple factor for bridge wave rectifier
(a) 1.11
(b) 1.21
(c) 1.5
(d) 0.48
Ans:d
15. BJT is ———–Device
(a) Bipolar
(b) Unipolar
(c) Constant current
(d) Constant voltage
Ans:a
16. SCR is
(a) un controlled device
(b) Regulator
(c) controlled device
(d) None of these
Ans:c
17. In CB Configuration of transistor, the input impedance is
(a) High
(b) medium
(c) Low
(d) none of these
Ans:c
18. Diac is
(a) Unidirectional device
(b) Bidirectional device
(c) Constant device
(d) None of these
Ans:b
19. Other name of SCR
(a) Transistor
(b) Diode
(c) Thyristor
(d) Resistor
Ans:c
20. UJT terminals are
(a) Base 1,Base 2,Emitter
(b) Base 1, collector,Emitter
(c) Base 1,Base 2,Collector
(d) None of these
Ans:a
21.A term intrinsic standoff ratio used in
(a) diode
(b) transistor
(c) UJT
(d) None of these
Ans:c
22.Which one works on negative resistance region
(a) diode
(b) transistor
(c) UJT
(d) None of these
Ans:c
23.SCR maybe considered as
(a) two diode model
(b) transistor model
(c) two transistor model
(d) None of these
Ans:c
24. Semiconductor is
conductor
insulator
either conductor or insulator
none of these
Ans:c
25. An example for conductor
copper
mica
plastic
carbon
Ans:a