Semiconductor Electronics : Materials, Devices and Simple Circuits


Semiconductor Electronics : Materials, Devices and Simple Circuits

  1. The intrinsic semiconductor becomes an insulator at ​​









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    At 0 K,  motion of free electrons stop. Hence conductivity becomes zero. Therefore, at 0 K intrinsic semiconductor becomes insulator.

    Correct Option: A

    At 0 K,  motion of free electrons stop. Hence conductivity becomes zero. Therefore, at 0 K intrinsic semiconductor becomes insulator.


  1. An alternating current can be converted into direct current by a









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    rectifier

    Correct Option: D

    rectifier



  1. In forward bias, the width of potential barrier in a p-n junction diode









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    We know that in forward bias of p-n junction diode, when positive terminal is connected to p-type diode, the repulsion of holes takes place which decreases the width of potential barrier by striking the combination of holes and electrons.

    Correct Option: B

    We know that in forward bias of p-n junction diode, when positive terminal is connected to p-type diode, the repulsion of holes takes place which decreases the width of potential barrier by striking the combination of holes and electrons.


  1. When a p-n junction diode is reverse biased the flow of current across the junction is mainly due to









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    When p-n junction is reverse biased, the flow of current is due to drifting of minority charge carriers across the junction.

    Correct Option: B

    When p-n junction is reverse biased, the flow of current is due to drifting of minority charge carriers across the junction.



  1. In the diagram, the input is across the terminals A and C and the output is across B and D. Then the output is









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    The given circuit is a circuit of full wave rectifier.

    Correct Option: C

    The given circuit is a circuit of full wave rectifier.