- AExtra electron in valence band
- BExtra electron in conduction band
- CMissing electron in valence band
- DMissing electron in conduction band
Explanation:
A hole is not itself a physical quantity but a missing electron in valence band. An electron from adjacent site jumps to fill this hole and thus creates a hole at its former site. So it seems as if the hole itself has moved.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Which of the following planets have rings around it
|
(a) Uranus |
(b) Mars |
(c) Jupiter |
(d) Saturn |
Which represents NAND gate
|
(a)
|
(b)
|
(c)
|
(d)
|
If a magnet of pole strength m is divided into four parts such that the length and width of each part is half that of initial one, then the pole strength of each part will be
|
(a) m/4 |
(b) m/2 |
(c) m/8 |
(d) 4m |
Two point charges Q and – 3Q are placed at some distance apart. If the electric field at the location of Q is E then at the locality of -3Q, it is
|
(a) - E |
(b) E/3 |
(c) -3E |
(d) -E/3 |
What is the equivalent resistance between A and B in the figure below if R = 3Ω
|
(a) 9 Ω |
(b) 12 Ω |
(c) 15 Ω |
(d) None of these |
We have two wires A and B of same mass and same material. The diameter of the wire A is half of that B. If the resistance of wire A is 24 ohm then the resistance of wire B will be
|
(a) 12 Ohm |
(b) 3.0 Ohm |
(c) 1.5 Ohm |
(d) None of the above |
Which of the following represents an infrared wavelength
|
(a) |
(b) |
(c) |
(d) |