Dynamic resistance of the diode is the ratio of _____ to ____.

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SSC JE Electrical 15 Nov 2022 Shift 2 Official Paper
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  1. change in voltage; change in current
  2. voltage; current
  3. current; voltage
  4. change in current; change in voltage

Answer (Detailed Solution Below)

Option 1 : change in voltage; change in current
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Static resistance of the diode

The resistance offered by the diode when connected in forward and reverse bias with a DC supply is known as the static resistance.

The static resistance of the diode is the ratio of diode voltage to diode current.

F1 Vinanti Engineering 11.01.23 D4

The static resistance is given by:

\(R_{DC}={V_D\over I_D}\)

Dynamic resistance of the diode

The resistance offered by the diode when connected in forward and reverse bias with an AC supply is known as a dynamic resistance.

The dynamic resistance of the diode is the ratio of the change in diode voltage to the change in diode current.

F2 Vinanti Engineering 15.11.22 D9

The dynamic resistance is given by:

\(R_{AC}={\Delta V_D\over \Delta I_D}\)

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