Download App

Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits1 Mark
MCQ
The electrical conductivity of pure germanium can be increased by:
  • A
    Increasing the temperature.
  • B
    Doping acceptor impurities.
  • C
    Doping donor impurities.
  • D
    Irradiating ultraviolet light on it.
✓

Answer

  1. Increasing the temperature.
  2. Doping acceptor impurities.
  3. Doping donor impurities.
  4. Irradiating ultraviolet light on it.

Explanation:

We know that the conductivity of any semiconductor can be increased by increasing the number of charge carriers. All the given methods are effective in increasing the number of free charge carriers. Hence, all options are correct.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will:
  1. Increase.
  2. Decrease.
  3. Remain unchanged.
  4. Either increase or decrease.
→

A soap bubble is given a negative charge, then its radius

(a) Decreases

(b) Increases

(c) Remains unchanged

(d) Nothing can be predicted as information is insufficient
→
Choose the correct answer from alternatives given.
If $\overrightarrow{\text{E}}$ and $\overrightarrow{\text{B}}$ represent electric and magnetic field vectors of an electromagnetic wave, the direction of propagation of the wave is along.
→
Three equal positive charges are kept at the corners of an equilateral triangle. What will be the vector sum of the forces acting on the particles?
→
Which of the following quantities do not depend on the choice of zero potential or zero potential energy?
→

A moving conductor coil in a magnetic field produces an induced e.m.f. This is in accordance with

(a) Amperes law

(b) Coulomb law

(c) Lenz’s law

(d) Faraday’s law
→

In a fission process, nucleus A divides into two nuclei B and C, their binding energies being  and   respectively. Then

(a)  

(b)  

(c)  

(d)  
→
Identify the correct statement about the charges q1​ and q2​:

→

A very high magnetic field is applied to a stationary charge. Then the charge experiences

(a) A force in the direction of magnetic field

(b) A force perpendicular to the magnetic field

(c) A force in an arbitrary direction

(d) No force
→
The number of electrons made available for conduction by dopant atoms depends strongly upon
→