NCERT Solutions for class 12 Physics | Chapter 14 - Semiconductor Electronics
Questions
1
In semi conductor which are responsible for conduction:
Answer:electron and hole both
2
In the middle of the depletion layer of a reverse biased p-n junction, the:
Answer:potential zero.
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4
For germanium crystal, the forbidden energy gap in joules
Answer:1.216 × 10-19
6
With fall of temperature, the forbidden energy gap of a semiconductor
Answer:remains unchanged
8
In a common base amplifier the phase difference between the input signal voltage and output voltage is :
Answer:0
10
On applying reverse bias to a junction diode, it:
Answer:raise the potential barrier
12
Energy bands in solids are a consequence of:
Answer:Pauli’s exclusion principle
13
To obtain p-type silicon semiconductor, we need to dope pure silicon with:
Answer:aluminium
14
The relation between number of free electrons (n) in a semiconductor and temperature (T) is given by:
Answer:n ∝ T3/2
16
The material most commonly used to manufacture electronic solid state devices is :
Answer:silicon
19
In intrinsic semiconductor at room temperature, the number of electrons and holes are:
Answer:equal.
Chapters
- Electric Charges & Fields
- Electrostatic potential and capacitance
- Electricity
- Moving charges and magnetism
- Magnetism and matter
- Electromagnetic induction
- Alternating current
- Electromagnetic waves
- Ray optics and optical instruments
- Wave optics
- Dual nature of radiation and matter
- Atoms
- Nuclei
- Semiconductor electronics
- Communication systems
