Question
Donor type impurity is found in(a) Trivalent elements (b) Pentavalent elements(c) In both the above(d) None of these
✓
Answer
(b) Pentavalent elements
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
The Boolean equation of $\text{NOR}$ gate is
→Curie-Weiss law is obeyed by iron at a temperature ......(a) Below Curie temperature(b) Above Curie temperature(c) At Curie temperature only(d) At all temperatures
The ripple factor in a half wave rectifier is(a) 1.21(b) 0.48(c) 0.6(d) None of these
The decay constant of a radioactive element is 0.01 per second. Its half life period is(a) 693 sec(b) 6.93 sec(c) 0.693 sec(d) 69.3 sec
Two long conductors, separated by a distance $d$ carry current $I_1$ and $I_2$ in the same direction. They exert a force $F$ on each other. Now the current in one of them is increased to two times and its directions is reversed. The distance is also increased to $3d$. The new value of the force between them is
→Curie temperature is the temperature above which(a) A paramagnetic material becomes ferromagnetic(b) A ferromagnetic material becomes paramagnetic(c) A paramagnetic material becomes diamagnetic(d) A ferromagnetic material becomes diamagnetic
In the circuit diagram shown in the adjoining figure, the resultant capacitance between $P$ and $Q$ is
→Light travels through a glass plate of thickness $t$ and having refractive index $n.$ If $c$ is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is
→A capacitor is charged by using a battery which is then disconnected. A dielectric slab is then slipped between the plates, which results in(a) Reduction of charge on the plates and increase of potential difference across the plates(b) Increase in the potential difference across the plate, reduction in stored energy, but no change in the charge on the plates(c) Decrease in the potential difference across the plates, reduction in the stored energy, but no change in the charge on the plates(d) None of the above
Audio signal cannot be transmitted because (a) The signal has more noise(b) The signal cannot be amplified for distance communication (c) The transmitting antenna length is very small to design(d) The transmitting antenna length is very large and impracticable