MPHS 0009 advanced electronics Q1

What are the four components of a basic power supply unit?

• SATA Cord, VGA Cord, CPU, MB Cord

• Transformer, Rectifier, Filter, Regulator

• Transformer, Control Unit, Power Connector, Regulator

• C-Filter, RC-Filter, Series Regulator, Shunt Regulator

Which circuit in the power supply converts low voltage AC to pulsating DC?

• Transformer

• Rectifier

• Filter

• Voltage Regulator

Transformer works on higher frequency has

• Lower size

• Larger size

• Does not depends on the size

• depends on whether the transformer is step up or step down

What is the BJT small signal model used for?

• To analyze and design electronic circuits using field-effect transistors

• To analyze and design electronic circuits using bipolar junction transistors.

• To control the speed of a DC motor

• To measure the temperature of a semiconductor material

In h parameters, the amplification factor is represented by

• h _re

• h _fe

• h _fb

• Depends upon the biasing

Field effect transistor and transistor are

• Voltage controlled and current controlled devices respectively

• Current controlled and voltage controlled devices respectively

• Both are voltage controlled

• Both are current controlled

In MOSFET, the heavily doped region(s) is(are)

• Substrate

• Source and drain terminals

• Drain region

• Gate region

For oscillator, following feedback is required

• None of the options

• Any kind of feedback where A. Beta =0

• Negative

• Positive

Due to negative feedback

• Band width decreases

• Band width increases

• Remains Constant

• Band width will depend on the input voltage

The disadvantage of using transformer for coupling the amplifier is

• dc isolation is not possible

• ac isolation is not possible

• Band width can not be tuned

• It affects the biasing