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The junction diode in the following circ...

The junction diode in the following circuit requires a minimum current of `1 mA` to be above the knee point `(0.7 V)` of its `I-V` characterstic curve. The voltage across the diode is independent of current above the knee point. If `V_(B)=5 V`, then the maximum value of `R` so that the voltage is above the knee point, will be

A

`4.3 k Omega`

B

`860 k Omega`

C

`4.3` Omega`

D

`860 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
`i=(5-0.7)/(R)`
`impliesR=(4.3)/(1xx10^(-3))=4.3kOmega`
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