MCQ
The impurity atoms with which pure silicon may be doped to make it a p-type semiconductor are those of:
- APhosphorus.
- BBoron.
- CAntimony.
- DNitrogen.
✓
Answer
- Boron.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Two condensers 
and 
in a circuit are joined as shown in figure. The potential of point A is 
and that of B is
. The potential of point D will be
|
(a) |
(b) |
(c) |
(d) |
If the binding energy per nucleon for 3Li7 is 5.6MeV, the total binding energy of a lithium nucleus is?
The size of an object as perceived by an eye depends primarily on:
- Actual size of the object.
- Distance of the object from the eye.
- Aperture of the pupil.
- Size of the image formed on the retina.
Figure (a) shows two capacitors connected in series and joined to a battery. The graph in figure (b) shows the variation in potential as one moves from left to right on the branch containing the capacitors, if
|
(a) |
|
(b) |
|
(c) |
|
(d) The information is not sufficient to decide the relation between |
A beam of light is converging towards a point I on a screen. A plane glass plate whose thickness in the direction of the beam = t, refractive index = μ, is introduced in the path of the beam. The convergence point is shifted by
|
(a) |
(b) |
(c) |
(d) |
The control rod in a nuclear reactor is made of
|
(a) Uranium |
(b) Cadmium |
(c) Graphite |
(d) Plutonium |
A coil of 40 turns and area $4 cm^2$ is suddenly removed from a magnetic field. Charge of $2 \times 10^{-4} C$ flows through it. If its resistance is 80 ohms, then magnetic flux density is:
→Using visible light what is the shortest wavelength which can be measured?
Generally semiconductor can be used safely between the temperatures:
If velocity of electron becomes equal to the velocity of light, then mass of electron will be: