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Q 1/26
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They have a cloud of free electrons (at all temperatures above absolute zero).Ifan electric field is applied electrons will flow causing an electric current
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Q 2/26
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In this solid, the electrons are tightly bound to atoms so few can break free to conduct electricity
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26 questions
Q.
They have a cloud of free electrons (at all temperatures above absolute zero).Ifan electric field is applied electrons will flow causing an electric current
1
30 sec
Q.
In this solid, the electrons are tightly bound to atoms so few can break free to conduct electricity
2
30 sec
Q.
At very low temperatures these have the properties of insulators
3
30 sec
Q.
This semiconductor's thermal vibration resultsin some bonds being broken generating free electrons which move about
4
30 sec
Q.
It is the addition of small amounts of impurities that drastically affects its properties
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30 sec
Q.
What does the material produce when they form an excess of electrons?
6
30 sec
Q.
What does the material produce when they form an excess of holes?
7
30 sec
Q.
What are the dominant charge carriers in a doped semiconductor called?
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30 sec
Q.
It is formed when p-type and n-type materials are joined
9
30 sec
Q.
It happens when the diffusion of positive charge in one direction and negative chargein theother produces a charge imbalance
10
30 sec
Q.
It is generated when the barrier opposes the flow of majority charge carriers and only a small number have enough energy to surmount it
11
30 sec
Q.
It is generated when the barrier encourages the flow of minority carriers and any that come close to it will be swept over
12
30 sec
Q.
It happens if if the p-type side is made positive with respect to the n-type side the height of the barrier is reduced
13
30 sec
Q.
It happens if the p-type side is made negative with respect to the n-type side the height of the barrier is in creased
14
30 sec
Q.
They generally have a turn-on voltage of about 0.5V and a conduction voltage of about 0.7V. They have a breakdown voltage that depends on their construction
15
30 sec
Q.
It uses the relatively constant reverse breakdown voltage to produce a voltage reference
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30 sec
Q.
What is the breakdown voltage called in zener diodes?
17
30 sec
Q.
It is formed by the junction between a layer of metal (e.g.aluminium) and a semiconductor
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30 sec
Q.
These are used in high-frequency oscillators, where they can be used to cancelout’ resistance in passive components
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30 sec
Q.
It is a diode that has two conducting regions separated by an insulating depletion region
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30 sec
Q.
It is a reservoir capacitor used to produce a steadier output
21
30 sec
Q.
use of a diode bridge reduces the time for which the capacitor has to maintain the output voltage and thus reduced the ripple voltage
22
30 sec
Q.
It is used to demodulate full amplitude modulated signals
23
30 sec
Q.
The circuits limit the excursion of the voltage wave form
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30 sec
Q.
They provide a low impedance path across the inductor to dissipate the stored energy
