Electronics Engineering Coaching Materials: Section 2 Module 2

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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