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Nishi Subramaniam
Asked: 2022-11-11T15:22:04+05:30 In:

A silicon diode is connected to a load resistance `R_(L)` as shown in the figure. If `V_(in)=15V` and `R_(L)=10kOmega`
(a) If barrier voltage, `V_(B)=0.7V` then calculate
(i) output voltage across `R_(L)`
(ii) current in diode and ltbRgt (iii) forward resistance.
(b) If diode is assumed ideal, then what will be
(i) output voltage and
(ii) output current in diode?
image

A silicon diode is connected to a load resistance `R_(L)` as shown in the figure. If `V_(in)=15V` and `R_(L)=10kOmega`
(a) If barrier voltage, `V_(B)=0.7V` then calculate
(i) output voltage across `R_(L)`
(ii) current in diode and ltbRgt (iii) forward resistance.
(b) If diode is assumed ideal, then what will be
(i) output voltage and
(ii) output current in diode?
image
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1 Answer

  1. (a) (i) `V_(out)=V_( i n)-V_(B)=15-0.7=14.3V`
    (ii) `L=(V_(out))/(R_(L))=(14.3)/(10xx10^(3))=1.43mA`
    (iii) `r_(f)=(V_(B))/(I)=(0.7)/(1.43xx10^(-3))=490Omega`
    (b) For ideal diode, `r_(f)=0,V_(B)=0`
    (i) `V_(out)=V_(i n)=15V`
    (ii) ` I=(V_(out))/(RF_(L))=(15)/(10xx10^(3))=1.5mA`

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