Semiconductor Electronics : Materials, Devices and Simple Circuits

Semiconductor Electronics : Materials, Devices and Simple Circuits

Easy Questions

Modern Physics

Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
  1. Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is :​​​








  1. View Hint View Answer Discuss in Forum

    Here D1 is in forward bias and D2 is in reverse bias so, D1 will conduct and D2 will not conduct. Thus, no current will flow through DC.

    I =
    ΔV
    		=
    5
    		=
    1
    		Amp.
    R102

    Correct Option: D

    Here D1 is in forward bias and D2 is in reverse bias so, D1 will conduct and D2 will not conduct. Thus, no current will flow through DC.

    I =
    ΔV
    		=
    5
    		=
    1
    		Amp.
    R102

  1. In an unbiased p-n junction, holes diffuse from the p-region to n-region because of








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    ​In p-region of p-n junction ​holes concentration > electrons concentration and in n-region ​electrons concentration > holes concentration.

    Correct Option: C

    ​In p-region of p-n junction ​holes concentration > electrons concentration and in n-region ​electrons concentration > holes concentration.

  1. ​In a n-type semiconductor, which of the following statement is true?​​








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    ​In a n-type semiconductor holes are minority carriers and pentavalent atoms are dopants.

    Correct Option: B

    ​In a n-type semiconductor holes are minority carriers and pentavalent atoms are dopants.

  1. If in a p-n junction, a square input signal of 10 V is applied as shown, then the output across RL will be








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    Here P-N junction diode rectifies half of the ac wave i.e., acts as half wave rectifier. During + ve half cycle ​Diode → forward biased output across will be

    During –ve half cycle Diode → reverse biased output will not obtained.​

    Correct Option: C

    Here P-N junction diode rectifies half of the ac wave i.e., acts as half wave rectifier. During + ve half cycle ​Diode → forward biased output across will be

    During –ve half cycle Diode → reverse biased output will not obtained.​

  1. Which one of the following represents forward bias diode ?​​








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    In forward bias, V1 > V2 i.e.,  in figure (d) p-type semiconductor is at higher potential w.r.t. n-type semiconductor.

    Correct Option: D


    In forward bias, V1 > V2 i.e.,  in figure (d) p-type semiconductor is at higher potential w.r.t. n-type semiconductor.