- AElectric discharge causes damage to semicondcutors.
- BThere are too many electrons.
- CA co-valent bond is broken due to thermal energy, the removal of one electron leaves a vacancy.
- DNone of these
Explanation:
Holes are created when a co-valent bond is broken due to thermal energy. The removal of one electron leaves a vacancy known as a hole.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A photon of wavelength 6630 Å is incident on a totally reflecting surface. The momentum delivered by the photon is equal to
|
(a) 6.63 × 10–27 kg-m/sec |
(b) 2 × 10–27 kg-m/sec |
(c) 10–27 kg-m/sec |
(d) None of these |
The energy released in a typical nuclear fusion reaction is approximately
|
(a) 25 MeV |
(b) 200 MeV |
(c) 800 MeV |
(d) 1050 MeV |
What is the equivalent resistance between the points A and B of the network
|
(a) |
(b) 8 W |
(c) 6 W |
(d) |
The phenomenon of light bending due to change of medium is called:
A common emitter amplifier is designed with NPN transistor (a = 0.99). The input impedance is 1 KW and load is 10 KW. The voltage gain will be
|
(a) 9.9 |
(b) 99 |
(c) 990 |
(d) 9900 |
An antenna behaves as resonant circuit only when its length is
|
(a) |
(b) |
|
(c) |
(d) |
There is a uniform electric field of strength along y-axis. A body of mass 1g and charge
is projected into the field from origin along the positive x-axis with a velocity 10m/s. Its speed in m/s after 10s is (Neglect gravitation)
|
(a) 10 |
(b) 5 |
(c) 10 |
(d) 20 |