Question
Download Solution PDFThe change in current through a junction diode is 1.5 mA when the forward bias voltage is changed by 0.6 V. The dynamic resistance is ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFResistance of a diode
1.) Static Resistance
The resistance offered by a p-n junction diode when it is connected to a DC circuit is called static resistance.
Static resistance is also defined as the ratio of DC voltage applied across the diode to the DC or direct current flowing through the diode.
\(R_{dc}={V_{dc}\over I_{dc}}\)
2.) Dynamic Resistance
The dynamic resistance is the resistance offered by the p-n junction diode when AC voltage is applied.
Dynamic resistance is also defined as the ratio of the change in voltage to the change in current.
\(R_{ac}={Δ V\over Δ I}\)
Calculation:
Given, ΔV = 0.6 V and ΔI = 1.5 mA
\(R_{ac}={0.6\over 1.5\times 10^{-3}}\)
Rac = 400 Ω
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