At 0 K temperature, a p-type semiconductor
does not have any charge carriers
has few holes but no free electrons
has few holes and few free electrons
has equal number of holes and free electrons
B.
has few holes but no free electrons
At 0 K temperature, a pure semiconductor behaves as an insulator, because it has a few holes in its valence band. But there is no free electron in this state.
The speed of an electron having a wavelength of 10-10 m is
7.25 × 106 m/s
5.25 × 106 m/s
6.26 × 106 m/s
4.24 × 106 m/s
The Cauchy's dispersion formula is
n = A + Bλ-2 + Cλ-4
n = A + Bλ-2 + Cλ4
n = A + Bλ2 + Cλ-4
n = A + Bλ2 + Cλ4
Assertion: Coloured spectrum is seen when we look through a muslin cloth.
Reason: It is due to the diffraction of white light on passing through fine slits
If both the assertion and reason are true and reason is a correct explanation of the assertion
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: When tiny circular obstacle is placed in the path of light from some distance, a bright spot is seen at the centre of the shadow of the obstacle.
Reason: Destructive interference occurs at the centre of the shadow.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false
If both assertion and reason are false.
Assertion: Quasar emits radiowaves more than radio galaxy.
Reason: Quasar has very small size
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.
Assertion: S.I. units are logical and coherent.
Reason: S.l. system of units is a rationalised system.
If both the assertion and reason are true and reason is a correct explanation of the assertion.
If both assertion and reason are true but assertion is not a correct explanation of the assertion.
If the assertion is true but the reason is false.
If both assertion and reason are false.