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Energy / Electricity
Electrical Engineer Test Part-4
20 Questions - Developed by:
Zeya
- Developed on:
2019-03-07
- 2,092 taken
Electrical Engineer Test Part-4 (V-1.7) (Question: 61-80)
1
6. In bipolar transistor, the current is due to _____
(b) Electrons
(a) Holes
(c) Both Holes & electrons
2
7. BJT is _____ controlled device.
(a) Field
(c) Resistor
(d) Current
(b) Voltage
3
8. The types of bipolar junction transistor are.
(C) Npp, ppn
(b) pnp, npn
(a) Ppn, npn
(d) nnp, pnp
4
9. The middle region of transistor is called
(c) Emitter
(b) Collector
(a) Base
5
10. The process by which impurities are added to a pure semiconductor is:
(a) Diffusing
(c) Doping
(b) Drift
(d) Mixing.
6
11. Base of the transistor is always ___ and ____doped
(b) Thin, Lightly
(a) Thick, Lightly
(c) Thin, heavily
7
12. The collector of a transistor is ___ doped
(a) Heavily
(b) Moderately
(c) Lightly
8
13. In a transistor the collector region is larger than the emitter region for ______
(a) Better Heat dissipation
(c) Better amplification
(b) Higher value of B
9
14. Doping concentration is the highest in _____ in a BJT.
(b) Collector region
(a) Emitter region
(c) Base region
(d) All of the above
10
15. The ___ region has highest thickness than all other regions in a BJT.
(c) Emitter
(b) Collector
(a) Base
11
16. The arrow in transistor symbol indicates the direction of ____
(a) Conventional emitter current
(d) ans a & b
(c) Supply current
(b) election current in emitter
12
17. The arrow in the transistor symbol indicates ____ terminal
(a) Base
(b) Collector
(c) Emitter
13
18 Transistor has ___pn junction
(c) Three
(b) Two
(a) One
14
19 The depletion region a emitter junction in an unbiased transistor extends more into the region
(a) Collector
(b) Base
(c) Emitter
15
20. The depletion region at collector junction in an unbiased transistor extends more into the base
Region because it is __ doped
(a) Heavily
(c) Lightly
(b) Moderately
16
21. Barrier voltage is ___ on the N side.
(b) Negative
(a) Positive
(c) Zero
17
22. __ of electrons and holes in the base region constitutes the base current.
(c) Thermal agitation
(a) Ionization
(b) Recombination
18
23. ___ constitutes the dominant current in a npn transistor.
(c) Both Holes & Electrons
(a) Holes
(b) Electrons
19
24. ___ is the highest current in any bipolar transistor.
(b) IC
(a) IB
(c) IE
20
25. The ___ current of a transistor is neither the largest nor the smallest.
(c) Emitter
(a) Base
(b) Collector
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