Which metal among these is widely used as a recombination agent by semiconductor manufacturers to obtain desired carrier lifetime of charge carriers?

A) Silver B)Gold C) Iron D) Aluminum

The Hall effect is used to determine the

A) Only the carrier concentration of semiconductors B) Current flowing across a semiconductor C) Type of semiconductor and carrier concentration D) None of the above

The thickness of space charge region for a P-N junction diode is of the order of :-

A) 10-4 cm B) 10-2 cm C) 10 cm D) 100 cm

The voltage out of an ideal voltage source is
A. Zero
B. Constant C. Load resistance dependent D. Internal resistance dependent

Pick the odd one in the group
A. Conductor
B. Semiconductor C. Four valence electrons D. Crystal structure

Doping material among the following is
A. n-type Semiconductor
B. Majority Carriers C. Extrinsic Semiconductor Material D. Pentavalent Material

The output voltage signal of a bridge rectifier is
A. Half-wave
B. Full-wave C. Bridge-rectified signal D. Sine wave

Zener diode can be described as
A. A rectifier diode.
B. A device with constant – voltage. C. A device with constant – current. D. A device that works in the forward region

What graphical method is used for modelling Diode Characteristics
A. Exponential Method
B. Small Signal Approximation C. Iteration Method D. Constant Voltage Drop Method

Number of PN Junctions in a Transistor
A. One
B. Two C. Three D. Four

The majority carriers in NPN and PNP Transistors are
A. Holes and Electrons
B. Electrons and Holes C. Acceptor Ions and Donor Ions D. None

Two types of Bipolar Junction Transistors (BJTs) are
A. nnn and ppp
B. npn and pnp C. pnn and npp D. nnp and ppn

What are the common faults in BJT?
A. Internal Short
B. Open Bias Resistor C. External Open and D. nnp and ppn

Which of the following options defines the diode

A. Is the simplest of semiconductor devices B. Has characteristics that closely match those of a simple switch C. Is a two terminal device D. All the above

Which of the following is also known as emitter follower

A. Common base amplifier B. Common emitter amplifier C. Common collector amplifier D. none of these

An electron in the conduction band ?

A) Is always chargeless B) Has tendency to leave the atom C) Has lower energy than an electron in the valence band D) Has higher energy than an electron in the valence band

The DC Current Gain of a Transistor is
A. Ratio of Emitter Current to Collector Current
B. Ratio of Base Current to Emitter Current C. Ratio of Collector Current to Base Current D. Ratio of Base Current to Collector Current

In microwave oscillators, negative resistance transistors and diodes are used in order to generate oscillations in the circuit.
a) True
b) False

Any device with negative impedance as its characteristic property can be called:
a) Energy source
b) Energy sink c) Oscillator d) None of the mentioned

For achieving steady state oscillation, the condition to be satisfied in terms of reflection coefficients is:
a) Гin=ГL
b) Гin=-ГL c) Гin=1/ГL d) None of the mentioned

To achieve stable oscillation, Zin + ZL=0 is the only necessary and sufficient condition to be satisfied by the microwave oscillator.
a) True
b) False