- AAbsence of electrons in the conduction band.
- BAll the electrons occupying the valence band.
- CLarge Eg value.
- DAll of the above.
Explanation:
At absolute zero temperature, in a pure semiconductor, all electrons occupy the valence band and no electrons are present in the conduction band. The forbidden gap energy Eg is large.
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Bonding in a germanium crystal (semi- conductor) is
| (a) Metallic | (b) Ionic |
(c) Vander Waal's type |
(d) Covalent |
In the given figure, when key K is opened, the reading of the ammeter A will be
|
(a) 50 A |
(b) 2 A |
(c) 0.5 A |
(d) |
If potential V = 100 ± 0.5 Volt and current I = 10 ± 0.2 amp are given to us. Then what will be the value of resistance
|
(a) 10 ± 0.7 ohm |
(b) 5 ± 2 ohm |
(c) 0.1 ± 0.2 ohm |
(d) None of these |
A cell of internal resistance r is connected to an external resistance R. The current will be maximum in R, if
|
(a) R = r |
(b) R < r |
(c) R > r |
(d) R = r/2 |