In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in:
- Circuit (a) only
- Circuit (b) only
- Circuit (c) only
- Both circuits (a) and (c)
The Correct Option is D
Solution and Explanation
In semiconductor circuits, the potential drop across two p-n junctions is influenced by the forward and reverse biasing applied to them. To determine where the potential drop is equal, we analyze the scenarios in the given circuits.
Circuit Analysis:
Circuit (a): This involves two diodes connected in such a way that the applied voltage is equally divided across them, assuming ideal conditions including positive biasing in series. Therefore, the potential drop is effectively the same across both p-n junctions.
Circuit (b): The arrangement and biasing lead to an unequal distribution of the voltage across the junctions, primarily if one diode is reverse-biased or if different resistance levels affect the voltage drop.
Circuit (c): Similar to Circuit (a), it involves conditions where any connected diodes would likely be in identical forward biasing configurations, ensuring the potential drop is equal across each junction.
Thus, in Circuits (a) and (c), the conditions provided make it possible for the potential drops to be equal across the two p-n junctions, typically due to series arrangements with identical forward bias. Hence, the correct answer is both circuits (a) and (c).
Top Questions on Semiconductor electronics: materials, devices and simple circuits
- Below given are some statements about electronic devices:
(A) Diodes can be used for rectifying an ac voltage.
(B) For semiconductors, band gap energy E\(_g\) > 3 eV.
(C) By changing the external applied voltage, junction barriers can be changed.
(D) p-n junction is the 'key' to all semiconductor devices.
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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.