# Physics Quiz on Semiconductor Diode for IIT JEE, NEET, Medical & Engineering Exam

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## Physics Quiz on Semiconductor Diode

Physics Quiz on Semiconductor Diode: Previous trends reveal that NEET aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations. In this post we are providing you Physics quiz on Semiconductor Diode.

## Physics Quiz on Semiconductor Diode

Q1. The electrical resistance of the depletion layer is large because _______.
a) It has no change carriers
b) It has holes as charge carriers
c) It has a large number of charge carriers
d) It contains electrons as charge carriers

a) It has no change carriers

Q2. The PN junction diode is used as _______.
a) An amplifier
b) An oscillator
c) A rectifier
d) A modulator

c) A rectifier

Q3. A PN junction has a thickness of the order ________.
a) 1 cm
b) 1 mm
c) 10-6 m
d) 10-12 cm

c) 10-6 m

Q4. When a PN junction diode is reverse biased ________.
a) No change in the current takes place
b) Height of the potential barrier decreases
c) Electrons and holes move away from the junction depletion region
d) Electrons and holes are attracted towards each other and move towards the depletion region

c) Electrons and holes move away from the junction depletion region

Q5. The cut-in voltage for silicon diode is approximately ______.
a) 0.2 V
b) 0.6 V
c) 1.1 V
d) 1.4 V

b) 0.6 V

Q6. On increasing the reverse bias to a large value in a PN junction diode, current _______.
a) Increases slowly
b) Remains fixed
c) Suddenly increases
d) Decreases slowly

c) Suddenly increases

Q7. In the depletion region of an unbiased PN junction diode there are _______.
a) Only electrons
b) Only fixed ions
c) Only holes
d) Both electrons and holes

b) Only fixed ions

Q8. In a PN junction diode ________.
a) The current in the reverse biased condition is generally very small
b) The reverse-biased current is strongly dependent on the applied bias voltage
c) The forward biased current is very small in comparison to reverse-biased current
d) The current in the reverse biased condition is generally very small but the forward-biased current is independent of the bias voltage

a) The current in the reverse biased condition is generally very small

Q9. If the forward voltage in a semiconductor diode is doubled, the width of the depletion layer will _______.
a) Become half
b) Become double
c) Remain unchanged
d) Become one-fourth

a) Become half

Q10. In the forward bias arrangements of a PN junction diode is _______.
a) The N end is connected to the positive terminal of the battery
b) The P end is connected to the positive terminal of the battery
c) The direction of the current is from N end to the P end in the diode
d) The P end is connected to the negative terminal of the battery

c) The direction of the current is from N end to the P end in the diode