Semiconductor Theory MCQs

Option A: A few free electrons

Option B: Many holes

Option C: Many free electrons

Option D: No holes or free electrons

Correct Answer: No holes or free electrons ✔

Option A: O

Option B: kO

Option C: MO

Option D: None of the above

Correct Answer: O ✔

Option A: Very narrow depletion layer

Option B: Almost no current

Option C: Very low resistance

Option D: Large current flow

Correct Answer: Almost no current ✔

Option A: 5 V

Option B: 3 V

Option C: Zero

Option D: 0.3 V

Correct Answer: 3 V ✔

Option A: Diffusion

Option B: Pressure

Option C: Ionisation

Option D: None of the above

Correct Answer: Diffusion ✔

Option A: Repel each other

Option B: Attract each other

Option C: Have no effect on each other

Option D: None of the above

Correct Answer: Attract each other ✔

Option A: +ve terminal to p and –ve terminal to n

Option B: -ve terminal to p and +ve terminal to n

Option C: -ve terminal to p and –ve terminal to n

Option D: None of the above

Correct Answer: +ve terminal to p and –ve terminal to n ✔

Option A: Acceptor ions

Option B: Holes and electrons

Option C: Donor ions

Option D: None of the above

Correct Answer: Holes and electrons ✔

Option A: Controlled switch

Option B: Bidirectional switch

Option C: Unidirectional switch

Option D: None of the above

Correct Answer: Unidirectional switch ✔

Option A: Equals the number of holes

Option B: Is greater than the number of holes

Option C: Is less than the number of holes

Option D: None of the above

Correct Answer: Equals the number of holes ✔

Option A: Junction capacitance

Option B: Minority carriers

Option C: Majority carriers

Option D: None of the above

Correct Answer: Minority carriers ✔

Option A: Aa

Option B: mA

Option C: kA

Option D: µA

Correct Answer: µA ✔

Option A: Minority carriers

Option B: Majority carriers

Option C: Junction capacitance

Option D: None of the above

Correct Answer: Minority carriers ✔

Option A: Decreases

Option B: Increases

Option C: Remains the same

Option D: None of the above

Correct Answer: Decreases ✔

Option A: Many holes only

Option B: A few free electrons and holes

Option C: Many free electrons only

Option D: No holes or free electrons

Correct Answer: A few free electrons and holes ✔

Option A: A battery

Option B: A conductor

Option C: An insulator

Option D: A piece of copper wire

Correct Answer: An insulator ✔

Option A: O

Option B: kO

Option C: MO

Option D: None of the above

Correct Answer: O ✔

Option A: Only holes

Option B: Only free electrons

Option C: Holes and free electrons

Option D: None of the above

Correct Answer: Holes and free electrons ✔

Option A: 10 atoms for 108 atoms

Option B: 1 atom for 108 atoms

Option C: 1 atom for 104 atoms

Option D: 1 atom for 100 atoms

Correct Answer: 1 atom for 108 atoms ✔

Option A: 6 x 104 cm

Option B: 60 x cm

Option C: 3 x 106 cm

Option D: 6 x 10-4 cm

Correct Answer: 60 x cm ✔

Option A: Germanium

Option B: Silicon

Option C: Carbon

Option D: Sulphur

Correct Answer: Silicon ✔

Option A: 3

Option B: 5

Option C: 4

Option D: 6

Correct Answer: 5 ✔

Option A: Holes

Option B: Free electrons

Option C: Valence electrons

Option D: Bound electrons

Correct Answer: Holes ✔

Option A: Remains the same

Option B: Increases

Option C: Decreases

Option D: None of the above

Correct Answer: Decreases ✔

A. A free electron
B. The incomplete part of an electron pair bond
C. A free proton
D. A free neutron

Correct Answer: B. The incomplete part of an electron pair bond
C ✔

Option A: 4

Option B: 5

Option C: 6

Option D: 3

Correct Answer: 3 ✔

Option A: Forces between nuclei

Option B: Forces between protons

Option C: Electron-pair bonds

Option D: None of the above

Correct Answer: Electron-pair bonds ✔

Option A: Covalent

Option B: Electrovalent

Option C: Co-ordinate

Option D: None of the above

Correct Answer: Covalent ✔

Option A: 100 O cm

Option B: 6000 O cm

Option C: 3 x 105 O m

Option D: 6 x 10-8 O cm

Correct Answer: 6000 O cm ✔

Option A: An insulator

Option B: An intrinsic semiconductor

Option C: p-type semiconductor

Option D: n-type semiconductor

Correct Answer: n-type semiconductor ✔

Option A: Positively charged

Option B: Negatively charged

Option C: Electrically neutral

Option D: None of the above

Correct Answer: Electrically neutral ✔

Option A: Free electrons

Option B: Holes

Option C: Valence electrons

Option D: Bound electrons

Correct Answer: Free electrons ✔

Option A: Goes up

Option B: Goes down

Option C: Remains the same

Option D: Can’t say

Correct Answer: Goes down ✔

Option A: 2

Option B: 3

Option C: 6

Option D: 4

Correct Answer: 4 ✔

Option A: Positive

Option B: Zero

Option C: Negative

Option D: None of the above

Correct Answer: Negative ✔