## Physics MCQ on Semiconductor Device for NEET, JEE, Medical and Engineering Exam 2022

MCQ on Semiconductor Device: Previous trends reveal that NEET/JEE 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 MCQ on Semiconductor Device, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

## MCQ on Semiconductor Device

Q1. What is the random motion of free electrons and holes due to thermal agitation called?
a) Pressure
b) Diffusion
c) Ionisation
d) None of the above

(b) Diffusion

Q2. How many valence electrons do trivalent impurities have?
a) 2
b) 3
c) 4
d) 5

(b) 3

Q3.  Which of the following does the resistivity of a semiconductor depend upon?
a) Length of the semiconductor
b) Atomic nature of the semiconductor
c) Shape and atomic nature of the semiconductor
d) Shape of semiconductor

(b) Atomic nature of the semiconductor

Q4. An incomplete part of an electron pair bond
a) attract each other
b) repel each other
c) have no effect on each other
d) destroy each other

(a) attract each other

Q5. Which among the following is the most commonly used semiconductor?
a) Silicon
b) Carbon
c) Germanium
d) Sulphur

(a) Silicon

Q6. Why is the mobility of free electrons greater than that of holes?
a) They are light
b) They mutually collide less
c) They require low energy to continue the motion
d) They carry negative energy

(c) They require low energy to continue the motion

Q7. Which of the following is created when trivalent impurities are added to a semiconductor?
a) Free electrons
b) Holes
c) Bound electrons
d) Valence electrons

(b) Holes

Q8. What happens to the resistance of a pure semiconductor when heated?
a) The resistance increases
b) The resistance decreases
c) The temperature remains the same
d) Can’t say

(b) The resistance decreases

Q9. Which of the following does a hole in the semiconductor define?
a) A free proton
b) A free neutron
c) A free electron
d) An incomplete part of an electron pair bond

(d) An incomplete part of an electron pair bond

Q10. How many valence electrons does a pentavalent impurity have?
a) 3
b) 4
c) 5
d) 6

(c) 5