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
On increasing the temperature of a semi-conductor material:
  • A
    Density of charge-carrier as well as their mobilities both increases.
  • B
    Density of charge-carriers increases, but their mobilities decreases.
  • C
    Density of charge-carries decreases, but their mobilities increases.
  • D
    Both density of charge-carriers as well as their mobilities decreases.
✓

Answer

  1. Density of charge-carriers increases, but their mobilities decreases.

Explanation:

On increasing the temperature of a semi-conductor material, the density of charge increases which apparently increases the hinderance and thus decreases their mobility.

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

Two charge + q  and  -q  are situated at a certain distance.  At the point exactly midway between them

(a) Electric field and potential both are zero

(b) Electric field is zero but potential is not zero

(c) Electric field is not zero but potential is zero

(d) Neither electric field nor potential is zero
→
A man wearing glasses of focal length +1m cannot clearly see beyond 1m:
  1. If he is farsighted.
  2. If he is nearsighted.
  3. If his vision is normal.
  4. In each of these cases.
→
The wavefronts of light coming from a distant source of unknown shape are nearly:
  1. Plane.
  2. Elliptical.
  3. Cylindrical.
  4. Spherical.
→

If in a coil rate of change of area is 5 m2/milli second and current become 1 amp from 2 amp in 2  If magnitude of field is 1 tesla then self inductance of the coil is

(a) 2 H

(b) 5 H

(c) 20 H

(d) 10 H
→

A radioactive sample has half-life of 5 years. Probability of decay in 10 years will be

(a) 100%

(b) 75%

(c) 50%   

(d) 25%
→
Let V and E represent the gravitational potential and field at a distance r from the centre of a uniform solid sphere. Consider the two statements:
  1. The plot of V against r is discontinuous.
  2. The plot of E against r is discontinuous.
  1. Both A and B are correct.
  2. A is correct but B is wrong.
  3. B is correct but A is wrong.
  4. Both A and B are wrong.
→
Is the ratio of frequencies of UV rays and IR rays in the glass more than, less than or equal to 1?
→
Which of the following is the same in parallel connection of resistances ?
→

In given figure, the potentiometer wire AB has a resistance of 5 W and length 10 m. The balancing length AM for the emf of 0.4 V is

(a) 0.4 m 

(b) 4 m

(c) 0.8 m

(d) 8 m
→
Fusion reaction take place at high temperature because:
→