KC+CET PYQs for P-N Junction with Solutions: Practice KCET Previous Year Questions

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Yashodeep Mahurkar

Updated on - Feb 16, 2026

P-N Junction is an important topic in the Physics section in KCET exam. Practising this topic will increase your score overall and make your conceptual grip on KCET exam stronger.

This article gives you a full set of KCET PYQs for P-N Junction with explanations for effective preparation. Practice of KCET Physics PYQs including P-N Junction questions regularly will improve accuracy, speed, and confidence in the KCET 2026 exam.

KCET PYQs for P-N Junction with Solutions

1.
The width of the depletion region in a p-n junction diode is
- increased by reverse bias
- increased by forward bias
- decreased by reverse bias
- independent of the bias voltage
View Solution
2.
A p-n junction diode is connected to a battery of emf 5.7 V in series with a resistor 5k \( \Omega \) such that it is forward biased. If the barrier potential of the diode is 0.7 V, neglecting the diode resistance, the current in the circuit is
- 1.14 mA
- 1 mA
- 1 A
- 1.14 A
View Solution
3.
Identify the incorrect statement :
- when a P-N junction diode is forward biased, the width of the depletion region decreases.
- when a P-N junction diode is reverse biased, the barrier potential increases
- a photon diode is operated in the reverse bias
- an LED is a lightly doped P-N junction diode which emits spontaneous radiation of forward biasing.
View Solution

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KCET PYQs for P-N Junction with Solutions

1.The width of the depletion region in a p-n junction diode is

2.A p-n junction diode is connected to a battery of emf 5.7 V in series with a resistor 5k \( \Omega \) such that it is forward biased. If the barrier potential of the diode is 0.7 V, neglecting the diode resistance, the current in the circuit is

3.Identify the incorrect statement :

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Structure based on different categories

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1.
The width of the depletion region in a p-n junction diode is

2.
A p-n junction diode is connected to a battery of emf 5.7 V in series with a resistor 5k \( \Omega \) such that it is forward biased. If the barrier potential of the diode is 0.7 V, neglecting the diode resistance, the current in the circuit is

3.
Identify the incorrect statement :