Vizag MT Re-Exam Mini Mock 2 for ESE & GATE EE Exams

Question 1

Statement (I): In transistor designed to be used for power amplification, the collector size is largest relative to the emitter and base.
Statement (II): The collector is connected to the body of the transistor and hence to a heat sink for hear dissipation to be effective.

Question 2

Consider the following:
1) Coupling capacitor
2) Emitter by pass capacitor
3) Emitter to base diffusion capacitance of the BJT
4) Stray capacitance of the circuit.
Which of these components in a R-C coupled amplifier control the lower cut-off frequency of the amplifier?

Question 3

Assertion (A): Complementary transistors are used for class B push-pull power amplifiers.
Reason (R): We don’t need transformers if we use complementary transistors in class- B push-pull power amplifiers.

Question 4

Consider the following statements regarding the class B power amplifiers (complementary symmetry type).
1) The efficiency of the amplifier is higher than that of class-A amplifier.
2) The power output is low.
3) Crossover distortion is present.
4) The standby power dissipation is absent.
Which of the above statement are correct?

Question 5

What will be the equipotential surface for a pair of equal and opposite line charges?

Question 6

The ratio of the transverse electric field to the transverse magnetic field is called as

Question 7

A quarter wave transformer can be used for matching accurately

Question 8

The correct expression is:

Question 9

Which of the following are universal gates.
1). AND 2). NAND
3). OR 4). NOR
5). NOT

Question 10

Consider the following gate network.
Which one the following gates is redundant?
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Question 11

A freewheeling diode in phase-controlled rectifiers

Question 12

In d.c. choppers, the waveforms for input and output voltages are respectively

Question 13

A cycloconverter-fed induction motor drive is most suitable for which one of the following?

Question 14

Consider the following statements about p-n junctions:
1) p-n junction behaves as a capacitor when forward biased.
2) p-n junction has p and n types semiconductors with depletion layer in between.
3) p-n junction has a wider depletion layer as compared to a Zener diode.
Which of these statements are correct?

Question 15

Consider the following statements:
Piezoelectric materials
1) Crystal can be shown aselectrical equivalent circuit similar to an inductor and a capacitor (Tank circuit).
2) Quartz, Rochelle salt, tourmaline.
3) Used in voltage stabilizers.
4) This exhibits the reverse effect electrostriction.
Which of these statements are correct?