Question:
$Ge$ and $Si$ diodes start conducting at $0.3 \,V$ and $0.7\, V$ respectively. In the following figure if Ge diode connection are reversed, the value of $V_o$ changes by : (assume that the Ge diode has large breakdown voltage)
$Ge$ and $Si$ diodes start conducting at $0.3 \,V$ and $0.7\, V$ respectively. In the following figure if Ge diode connection are reversed, the value of $V_o$ changes by : (assume that the Ge diode has large breakdown voltage)
Updated On: Feb 2, 2026
- $0.6\, V$
- $0.8\, V$
- $0.4 \,V$
- $0.2 \,V$
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The Correct Option is C
Solution and Explanation
Initially $Ge$ & $Si$ are both forward biased so current will effectivily pass through $Ge$ diode with a drop of $0.3\, V$
if $''Ge''$ is revesed then current will flow through $''Si''$ diode hence an effective drop of $(0.7 - 0.3) = 0.4\, V$ is observed.
if $''Ge''$ is revesed then current will flow through $''Si''$ diode hence an effective drop of $(0.7 - 0.3) = 0.4\, V$ is observed.
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Concepts Used:
Semiconductors
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.
Properties of Semiconductor:
- Semiconductor acts like an insulator at Zero Kelvin. On increasing the temperature, it works as a conductor.
- Due to their exceptional electrical properties, semiconductors can be modified by doping to make semiconductor devices suitable for energy conversion, switches, and amplifiers.
- Lesser power losses.
Uses of Semiconductor:
- Semiconductors are widely used in manufacturing electronics devices like transistors, diodes, sensors, integrated circuits.
- Semiconductors are widely used in all electronic devices, like mobile phones, digital cameras, communication devices, trains, ATMs, etc.