A level Semiconductor Electronics Quiz 2

17 Questions

Quiz Description

In this quiz, which is the 2nd quiz on Semiconductor Electronics, we will focus mainly on the types of semiconductors and their function and use practically. 

Semiconductor electronics can be put simply to mean semiconductors used for making electronics like we know Silicon is used for diodes and a lot of components in electronic devices. There are two types of semiconductors, the p-type and the n-type semiconductors(n=negative and p=positive). For example, Silicon is used in electronic circuit fabrication and gallium arsenide is used in solar cells, when doped with impurities like Germanium, it becomes an extrinsic p-type semiconductor. Diodes are manufactured using the p and n-type semiconductors and they are used as rectifiers in this case. Transistors are also made using semiconductors.

This particular topic in physics is very useful in all fields as it concerns computer engineering and life as a whole, so be sure to take the quiz, for you will find it very educational and worth it.
Good luck! 

1:

In a half wave rectifier, the r.m.s. value of the a.c. component of the wave is


Correct
  • 1:
    equal to d.c. value
  • 2:
    more than d.c. value
  • 3:
    less than d.c. value
  • 4:
    zero
2:

Bridge type rectifier uses


Correct
  • 1:
    four diodes
  • 2:
    six diodes
  • 3:
    two diodes
  • 4:
    one diode
3:

In the middle of the depletion layer of a reverse- biased p-n junction, the


Correct
  • 1:
    electric field is zero
  • 2:
    potential is maximum
  • 3:
    electric field is maximum
  • 4:
    potential is zero
4:

The cause of the potential barrier in a p-n junction diode is


Correct
  • 1:
    depletion of positive charges near the junction
  • 2:
    concentration of positive charges near the junction
  • 3:
    depletion of negative charges near the junction
  • 4:
    concentration of positive and negative charges near the junction
5:

When p-n junction diode is forward biased then


Correct
  • 1:
    both the depletion region and barrier height are reduced
  • 2:
    the depletion region is widened and barrier height is reduced
  • 3:
    the depletion region is reduced and barrier height is increased
  • 4:
    Both the depletion region and barrier height are increased
6:

In forward biasing of the p–n junction


Correct
  • 1:
    the positive terminal of the battery is connected to p–side and the depletion region becomes thick
  • 2:
    the positive terminal of the battery is connected to n–side and the depletion region becomes thin
  • 3:
    the positive terminal of the battery is connected to n–side and the depletion region becomes thick
  • 4:
    the positive terminal of the battery is connected to p–side and the depletion region becomes thin
7:

Reverse bias applied to a junction diode


Correct
  • 1:
    increases the minority carrier current
  • 2:
    lowers the potential barrier
  • 3:
    raises the potential barrier
  • 4:
    increases the majority carrier current
8:

Barrier potential of a P-N junction diode does not depend on


Correct
  • 1:
    doping density
  • 2:
    diode design
  • 3:
    temperature
  • 4:
    forward bias
9:

In a P -N junction


Correct
  • 1:
    the potential of P & N sides becomes higher alternately
  • 2:
    the P side is at higher electrical potential than N side.
  • 3:
    the N side is at higher electric potential than P side.
  • 4:
    both P & N sides are at same potential.
10:

In a semiconductor diode, the barrier potential offers opposition to


Correct
  • 1:
    holes in P-region only
  • 2:
    free electrons in N-region only
  • 3:
    majority carriers in both regions
  • 4:
    majority as well as minority carriers in both regions
11:

Filter circuit


Correct
  • 1:
    eliminates a.c. component
  • 2:
    eliminates d.c. component
  • 3:
    does not eliminate a.c. component
  • 4:
    None of these
12:

 Zener diode is used for


Correct
  • 1:
    amplification
  • 2:
    rectification
  • 3:
    stabilisation
  • 4:
    all of the above
13:

Forward biasing is that in which applied voltage


Correct
  • 1:
    increases potential barrier
  • 2:
    cancels the potential barrier
  • 3:
    is equal to 1.5 volt
  • 4:
    None of these
14:

Diffusion current in a p-n junction is greater than the drift current in magnitude


Correct
  • 1:
    if the junction is forward-biased
  • 2:
    if the junction is reverse-biased
  • 3:
    if the junction is unbiased
  • 4:
    in no case
15:

The diffusion current in a p-n junction is from the


Correct
  • 1:
    n-side to the p-side
  • 2:
    p-side to the n-side
  • 3:
    n-side to the p-side if the junction is forward-biased and in the opposite direction if it is reverse-biased
  • 4:
    p-side to the n-side if the junction is forward-biased and in the opposite direction if it is reverse-biased
16:

The drift current in a p-n junction is from the


Correct
  • 1:
    n-side to the p-side
  • 2:
    p-side to the n-side
  • 3:
    n-side to the p-side if the junction is forward-biased and in the opposite direction if it is reverse biased
  • 4:
    p-side to the n-side if the junction is forward-biased and in the opposite direction if it is reverse-biased
17:

If the two ends of a p-n junction are joined by a wire


Correct
  • 1:
    there will not be a steady current in the circuit
  • 2:
    there will be a steady current from the n-side to the p side
  • 3:
    there will be a steady current from the p-side to the n side
  • 4:
    there may or may not be a current depending upon the resistance of the connecting wire

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A level Semiconductor Electronics Quiz 2
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