Resistance of an ideal diode during reverse biasing is
Show Hint
- Zero
- Unity
- Finite
- Infinite
The Correct Option is D
Solution and Explanation
It has two modes of operation:
(1) Forward Bias: When the voltage across the diode is positive (anode positive relative to cathode), it acts like a closed switch (short circuit) with zero resistance, allowing infinite current flow with zero voltage drop
(2) Reverse Bias: When the voltage across the diode is negative (anode negative relative to cathode), it acts like an open switch (open circuit) with infinite resistance, allowing zero current to flow regardless of the reverse voltage magnitude
Therefore, the resistance of an ideal diode during reverse biasing is infinite
Top Questions on Analog Electronics
A 3-bit DAC is implemented using ideal opamp and switches as shown in the figure. Each of the switches gets closed when its corresponding digital input is at logic 1. For a digital input of 110, the resistance \( R_{in} \) seen from the reference source and the current \( I \), are
- GATE IN - 2025
- Signals and Systems
- Analog Electronics
A chopper amplifier shown in the figure is designed to process a biomedical signal \( v_{in}(t) \) to generate conditioned output \( v_{out}(t) \). The signals \( v_{in}(t) \) and \( v_{os}(t) \) are band limited to 50 Hz and 10 Hz, respectively. For the system to operate as a linear amplifier, choose the correct statement from the following options.
- GATE IN - 2025
- Signals and Systems
- Analog Electronics
In the circuit shown, assume that the BJT in the circuit has very high \( \beta \) and \( V_{BE} = 0.7 \) V, and the Zener diode has \( V_Z = 4.7 \) V. The current \( I \) through the LED is ________ mA (rounded off to two decimal places).
- GATE IN - 2025
- Signals and Systems
- Analog Electronics
For the ideal opamp based circuit shown in the figure, the ratio \( \frac{V}{I} \) is
- GATE IN - 2025
- Signals and Systems
- Analog Electronics
In the given circuit below, voltage \(V_C(t)\) is:
- AP PGECET - 2024
- Instrumentation Engineering
- Analog Electronics
Questions Asked in AP PGECET exam
The representation of octal number \((532.2){_8}\) in decimal is ____ .
- AP PGECET - 2024
- Digital Electronics and Logic Gates
Given the signal,
\(X(t) = cos t\), if \(t<0 \)
\(Sin\ t\), if \(t\ge0 \)
The correct statement among the following is?- AP PGECET - 2024
- Signals and Systems
A linear system at rest is subject to an input signal \(r(t) = 1 - e^{-t}\). The response of the system for t>0 is given by \(c(t) = 1 - e^{-2t}\). The transfer function of the system is:
- AP PGECET - 2024
- Control Systems
- Phase difference between two voltages at frequencies above 10Hz can be measured using ___ .
- AP PGECET - 2024
- Cathode Ray Oscilloscope
- Which of the following represents the correct relationship between frequency and angular frequency?
- AP PGECET - 2024
- Signals and Systems