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
Semiconductors are generally made up of which substance?
  • A
    Silicon
  • B
    Carbon
  • C
    Phosphorus
  • D
    Boron
✓

Answer

  1. Silicon

Explanation:

Semiconductors are made of Si, generally. Because Si is the second most abundant element in earth's crust after oxygen and is less expensive than other semiconductors used in intrinsic semiconductors. 

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

For a colour of light the wavelength for air is 6000 Å and in water the wavelength is 4500 Å. Then the speed of light in water will be

(a) 5  

(b) 2.25 

(c) 4.0  

(d) Zero
→
Out of dia, para and ferromagnetism, the universal property of all substances is:
→
A heated body emits radiation which has maximum intensity near the frequency v0. The emissivity of the material is 0.5. If the absolute temperature of the body is doubled:
  1. The maximum intensity of radiation will be near the frequency 2v0
  2. The maximum intensity of radiation will be near the frequency $\frac{\text{v}_0}{2}$
  3. The total energy emitted will increase by a factor of 16.
  4. The total energy emitted will increase by a factor of 8.
→

Laser beams are used to measure long distances because

(a) They are monochromatic

(b) They are highly polarised

(c) They are coherent

(d) They have high degree of parallelism
→
Reciprocal of Impedance is:
→
A dip circle is taken to geomagnetic equator. The needle is allowed to move in a vertical plane perpendicular to the mangetic meridian. the needle will stay in:
→
Let the angle between two nonzero vectors $\overrightarrow{\text{A}}$ and $\overrightarrow{\text{B}}$ be 120° and its resultant be $\vec{\text{c}}:$
  1. C must be equal to $|\text{A}-\text{B}|$
  2. C must be less than $|\text{A}-\text{B}|$
  3. C must be greater than $|\text{A}-\text{B}|$
  4. C may be equal to $|\text{A}-\text{B}|$
→

Number of secondary electrons emitted per number of primary electrons depends on

(a) Material of target

(b) Frequency of primary electrons

(c) Intensity

(d) None of the above
→

In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and a = 0.98

(a) 0.04 mA

(b) 1.96 mA

(c) 0.98 mA

(d) 2 mA
→

In Bainbridge mass spectrograph a potential difference of 1000 V is applied between two plates distant 1 cm apart and magnetic field in B = 1T. The velocity of undeflected positive ions in m/s from the velocity selector is

(a)  

(b)  

(c)  

(d)  
→