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A P-N junction diode can withstand curre...

A `P-N` junction diode can withstand currents up to `10 mA`. Under forward bias, The diode has a potential drop of `0.5 V` across it which is assumed to be independent of current. The maximum voltage of the battery used to forward bias the diode when a resistance of `200 Omega` is connected in series with it is

A

`2.5V`

B

`2.6V`

C

`2.7V`

D

`2.8V`

Text Solution

Verified by Experts

The correct Answer is:
A
`i=(E-V_(b))/(R)`
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  • A p-n junction diode when forward biased has a drop of 0.4 V which is assumed to be independent of current. A current excess of 10 mA through the diode damages (burns ) the diode. If we want to use a 2 V battery to forward bias the diode, what should be the value of resistor used in series with the diode so that the maximum current does not exceed 5 mA?

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