This is the Section 2 Module 2 of the compiled Electronics Coaching Materials taken from different sources including but not limited to Electronics books, past Board Exams Questions, Journals and other Electronics References. This particular Coaching Notes in Electronics Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.
Electronics Engineering Coaching: Section 2 Module 2
BJT/ FET
1. Defective transistor can be identified using ____ packaging.
LEVEL 0
2. A zero-biased JFET is known to be ____.
CONDUCTING
3. Control element for voltage regulation
BJT
4. Light Emitting Diode (LED) junction
REVERSED-BIASED
5. MOSFET input impedance
EXTREMELY HIGH
6. Leads of JFET that corresponds to emitter, base and collector
SOURCE, GATE AND DRAIN
7. The _____ of a common collector configuration is unity
VOLTAGE GAIN
8. Arrow of MESFET
SUBSTRATE
9. NPN transistor relaxation oscillator
NOT IMPORTANT
10. The resistance of a semiconductor is called as
BULK RESISTANCE
11. Natural resistance of P type or N type semiconductor
BULK RESISTANCE
12. The diode is zero bias when the anode and cathode have the same
POTENTIAL
13. The light activated diode is also called as
PHOTODIODE
14. The high voltage diode is ___________ diac
BI – DIRECTIONAL TRIGGER
15. Highest efficiency
CLASS C
16. Emitter junction produced on the base layer of the mesa transistor
VACUUM EVAPORATION OR DIFFUSION
17. Current ICBO flows in
COLLECTOR AND BASE LEADS
POWER SUPPLY
1. The reason why the core of transformer is laminated
EDDY CURRENT LOSS
2. Alkaline cells advantage compared to zinc carbon is that alkaline cells can operate at ____ temperature
LOWER
3. AC variation at the output of the power supply
RIPPLE
4. AC voltage can be converted to unidirectional by ______
RECTIFIER
5. The most efficient regulator
SHUNT REGULATOR
6. Active positive plate consisting of nickel
EDISON CELL
7. In half-wave rectifier, current flow in the _______
HALF POSITIVE CYCLE ONLY
8. AC variations in the output of a power supply
RIPPLE
9. The output of a rectifier without a filter
PULSATING DC
10. Advantage of using methanol instead of hydrogen in fuel cells is that it is easy to
TRANSPORT AND STORE
11. The IC regulator with fix negative value
79XX Series
12. Transformers operate poorly at low frequency because of its high ______
MAGNETIZING CURRENT
13. Lap winding is also called as
MULTIPLIER OR PARALLEL WINDINGS
14. What regulator dissipates less power therefore generates less heat
SWITCH REGULATOR
15. Increase in core loss is caused by
EDDY CURRENT
16. The number of commutator segments in a DC machine is equal to the number of
COILS
17. _________ motors never used belt-connected loads
SERIES
18. When the speed is doubled while the flux is constant, back emf is _______.
DOUBLED
19. In armature winding, wave winding is a ____ winding.
SERIES
20. In dc motors, speed can be varied by changing the ___
MAGNETIC FIELD
21. Commutators are commonly found
DC MOTOR
22. If the spin speed of motor is 100%, the rotor moves slowly at a____level.
LOW
23. _________ battery is most likely to be found in an uninterrupted power supply.
LEAD ACID
24. Electronic machine that converts ac voltage to dc voltage and vise versa.
ROTARY CONVERTER
25. Disadvantage of mercury cells
HAZARDOUS TO ENVIRONMENT
26. In a power supply with filtering capacitor, the ripple voltage ____ when the load is removed
DROPS TO ZERO
GENERATORS/MOTORS
1. Type of winding where heavy conductors are placed in the body of rotor
SQUIRREL CAGEWINDING
2. When the power level of electric motor remains constant, speed is halved, torque is
DOUBLED
3. Sensing element in the acceleration turbulence
SEISMIC MASS
4. Why does high current is Needed in motor when starting?
BECAUSE THERE IS STILL LOW BACK EMF
5. Error in ohmmeter is commonly because of
AGING BATTERY
6. Advantage of alkaline cell to zinc carbon cell is that alkaline cell operates in __ temperature
LOW
7. Coil is for
HIGH DC VOLTAGE
8. Torque remains constant as load changes
TORQUE CONTROL
9. Next to squeeze interval
WELD INTERVAL
10. High current and power level of motor
11. Where does the stator gets its voltage
MAGNETIC COUPLING OF THE ROTOR
12. A series motor that can be used as ac or dc motor
UNIVERSAL MOTOR
13. An alternator using a gas turbine as a prime mover should have what type of rotor
TURBINE DRIVEN
14. Consists of single coil that rotates in the magnetic field to produce ac voltage
ELEMENTARY GENERATOR
15. One advantage of shell method in power transformer winding is to provide maximum
COUPLING
16. Rotating device used to convert mechanical energy to electrical energy
DYNAMO
17. Left part of pinch-off locus
OHMIC REGION
18. Advantage of CCO over VFO
LOW DRIFT
19. Torque produced by the change of voltage and current
DEFLECTING TORQUE
20. Motor used in elevator
COMMULATIVELY COMPOUNDED
21. The starting torque of a simple squirrel cage motor is
LOW
22. The direction of rotation of the DC shunt motor can be reversed by reversing the
FIELD/ARMATURE
23. When the flux per pole in an AC generator increases, the speed
DECREASES
24. In __________, speed increases as the load increases
DIFFERENTIALLY COMPOUNDED MOTOR
25. When power is applied briefly at constant bursts, the motor is
JOGGED
26. Commonly used actuator
ELECTRIC MOTOR
27. The reason of the rotation of the motor
CHANGING MAGNETIC FIELD
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