A positive ion is formed when

The difference between an insulator and semiconductor is

Electron-hole pairs are produced by

Recombination is when

The current in a semiconductor is produced by

In an intrinsic semiconductor,

The process of adding an impurity to an intrinsic semiconductor is called

A trivalent impurity is added to silicon to create

The purpose of pentavalent impurity is to

The majority carriers in an n-type semiconductor are

A pn junction is formed by

The depletion region is created by

In a semiconductor material, what will happen to the number of free electrons when the temperature rises?

A diode is operating at a temperature of 20°C. Determine the thermal voltage VT.

What is the forward diode current if it operates at a temperature of 20°C and the

diode voltage drop is 0.65 with a reverse saturation current of

10nA?

BJT is constructed with ______ doped semiconductor regions

separated by ____ PN junctions.

For operation as an amplifier, the base of an NPN transistor must

be _______ with respect to ________.

The bias condition for a transistor to be used as a linear amplifier

is called

A JFET always operates with

A MOSFET differs from a JFET mainly because

An n-channel D-MOSFET with a positive VGS is operating in

Boron atoms are diffused into a pure silicon material. The net charge of the resulting material is __.

When electron carriers from an N-type material goes to the hole in the adjacent P-type material, __.

Charges that only shift positions and does not move in response to electric field

Which of the following statements is true?

The excess electrons that do not participate in the covalent bonding during the doping process.

The current that exist in the reverse-bias condition is ___.

Which of the following causes the diode not to conduct? Consider VF as the forward voltage and VR as a reverse voltage. (1) |VF| > |VTH| (2)|VF| < |VTH| (3) VF=0 (4) |VR|=|VF|

Which of the following is NOT true when a diode is forward biased? (1) Maximum current (2) Maximum voltage (3) Maximum Resistance (4) Maximum power

A power supply unit component that converts a sinusoidal wave into a pulsating type.

Consider the circuit in figure 1. Calculate the voltage VQ.

Consider the circuit in figure 1. Which of the following is true about the bias of the diodes?

Consider the circuit in figure 1. Which of the following statements is true?

Consider the circuit in figure 1. Calculate the current through one of the Si diodes.

Consider the circuit in figure 1. What is the voltage drop across one of the Si diodes if it is connected in REVERSE?

Varying the width of the depletion region of a diode through the application of a reverse bias voltage is equivalent to varying the plate separation of a very small capacitor.

To regulate voltage, a zener should be placed __ with the load.

What will not cause a Zener to breakdown?

A reverse bias voltage is applied to a zener. If the applied voltage is greater that the zener rating, what is the voltage across the zener?

What is the condition of a zener during forward bias with the applied voltage less than the treshold?

Which of the following is/are advantages of solid-state transistors?

The region in the BJT which is thin and lightly doped

For the fixed bias arrangement shown, calculate the base current IB if RB = 150 kΩ, RC = 4.7 kΩ, VCC = 18 V, and ß = 90.

A bipolar junction transistor is used as a power control switch by biasing it in the cut-off region or in the saturation region. In the ON state, for the BJT

For the fixed bias arrangement shown, calculate the collector current IC if RB = 68 kΩ, RC = 2.2 kΩ, VCC = 15 V, and ß = 70.

The best approximation for Vc in the circuit shown will be (assume ß to be high)

When a diode is reverse biased, the depletion

region widens. Since it is in between positively

charged holes and negatively charged electrons,

it will have an effect of a capacitor. This

capacitance is called?

In a semiconductor diode, the total

capacitance, that is the capacitance

between terminals and electrodes, and the

internal voltage variable capacitance of the

junction is called

What capacitance is significant when the

diode is forward biased?

It is the magnitude of current that the diode can handle without burning when forward biased.

It is a required voltage in order to produce forward current. This is also the voltage drop across the diode during conduction.

This also known as leakage current

It is a maximum reverse voltage that can be applied before current surges and enter the avalanche region.

Time taken by the diode to operate in the reverse conduction from forward conduction.

a maximum power the diode can handle without burning

a maximum temperature of the diode can operate before burning its junction.

a reduction of power handling capability of the diode due to the increase of ambient temperature from room temperature

A diode that can be used as an oscillator or amplifier.

a diode that is biased to operate in the negative resistance region.

Voltage variable capacitor is a device that

utilizes the variation of the PN junction

capacitance when biased differently.

a type of PN junction

that emits light when forward biased.

It has small transparent window that allow light to strike the PN junction

Which semiconductor diode is mostly used

to detect near infrared?

The primary use of zener diode in

electronic circuits.

A diode that is especially designed to

operate as a voltage-variable capacitor. It

utilizes the junction capacitance of a

semiconductor diode

The capacitance of a varactor will _____

when the reverse-bias voltage is increased.

Refers to a special type of diode which is

capable of both amplification and

oscillation.

The process of emitting photons from a

semiconductive material is called

Silicon and Germanium are not used in

LEDs because

A diode capable of regulating current

Schottky diodes are also known as

A diode consisting of heavily doped P and

N regions separated by an intrinsic region.

Board Exam Question

The application of a

forward-bias potential to a PN junction will

Board Exam Question

The normal operating region

for a zener diode is the