Download App

14. Semicondutor electronics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics14. Semicondutor electronics1 Mark
MCQ
The intrinsic semiconductor becomes an insulator at
  • A
    $0^\circ C$
  • B
    $ - 100^\circ C$
  • C
    $300\;K$
  • ✓
    $0\;K$
✓

Answer

Correct option: D.
$0\;K$
d
At $0\;K$ temperature semiconductor behaves as an insulator, because at very low temperature electrons cannot jump from the valence band to conduction band.

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 (1 Marks)" from 14. Semicondutor electronics→14. Semicondutor electronics — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Phase difference between ac current and emf is $\frac{\pi}{2}$.Which of the following cannot be a component of the circuit?
→
The wavefront of a distant source of unknown shape is approximately
→
Between the plates of a parallel plate capacitor a dielectric plate is introduced just to fill the space between the plates. The capacitor is charged and later disconnected from the battery. The dielectric plate is slowly drawn out of the capacitor parallel to the plates. The plot of the potential difference across the plates and the length of the dielectric plate drawn out is
→
A capacitor consists of two parallel plates, with an area of cross-section of $0.001 m^2$, separated by a distance of 0.0001 m. If the voltage across the plates varies at the rate of $10^8 V / s$, then the value of displacement current through the capacitor is
→
Apparent wavelength of light coming from a star moving away from earth is $0.02 \%$ more than its actual wavelength. Velocity of star is ........ $km / s$
→
The electron concentration in an $n-$type semiconductor is the same as hole concentration in a $p-$type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
→
Assertion : In a movie, ordinarily 24 frames are projected per second from one end to the other of the complete film.
Reason : The image formed on retina of eye is sustained upto 1/10 second after the removal of stimulus.
→
The distance between the body centred atom and a corner atom in sodium (a = 4.225 Å) is
→
The simple Bohr model cannot be directly applied to calculate the energy levels of an atom with many electrons. This is because:
→
Assertion $(A):$ If the frequency of the applied $AC$ is doubled, then the power factor of a series $R-L$ circuit decreases.

Reason $(R):$ Power factor of series $R-L$ circuit is given by $\cos \theta=\frac{2 R }{\sqrt{ R ^2+\omega^2 L ^2}}$

→