# Semiconductor Diode MCQs for NEET

NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Semiconductor Diode Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

## MCQs on Semiconductor Diode

1. In the forward bias arrangements of a PN junction diode
(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

Answer: (b) The P end is connected to the positive terminal of the battery

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

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

3. 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

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

Answer: (a) It has no change carriers

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

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

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

Answer: (b) Electrons and holes move away from the junction depletion region

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

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