Semiconducting Devices Question 48

Question: In the following circuits PN-junction diodes D1, D2 and D3 are ideal for the following potential of A and B, the correct increasing order of resistance between A and B will be (i) - 10 V, - 5V (ii) - 5V, - 10 V (iii) - 4V, - 12V

Options:

A) (i) < (ii) < (iii)

B) (iii) < (ii) < (i)

C) (ii) = (iii) < (i)

D) (i) = (iii) < (ii)

Show Answer

Answer:

Correct Answer: C

Solution:

(i) VA = -10V and VB = -5V Diodes D1 and D3 are reveres biased and D2 is forward biased.

$ \Rightarrow R _{AB}=R+\frac{R}{4}+\frac{R}{4}=\frac{3}{2}R $ .

(ii) When VA = - 5V and VB = - 10V Diodes D2 is reverse biased D1 and D3 are forward biased
$ \Rightarrow R _{AB}=\frac{R}{4}+\frac{R}{2}+\frac{R}{4} $ =R.

(iii) In this case equivalent resistance between A and B is also R.

Hence (ii) = (iii) < (i).



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक