MCQ
Donor type impurity is found in
- ATrivalent elements
- ✓Pentavalent elements
- CIn both the above
- DNone of these
✓
Answer
Correct option: B.
Pentavalent elements
b
(b)One atom of pentavalent impurity, donates one electron.
(b)One atom of pentavalent impurity, donates one electron.
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
A transformer has an efficiency of $80 \%$ and works at $10 \mathrm{~V}$ and $4 \mathrm{~kW}$. If the secondary voltage is $240 \mathrm{~V}$, then the current in the secondary coil is :
→Interference fringes were produced in Young's double slit experiment using light of wavelength $5000\,\mathop A\limits^o $. When a film of material $2.5\times10^{-3}\, cm$ thick was placed over one of the slits, the fringe pattern shifted by a distance equal to $20$ fringe widths. The refractive index of the material of the film is
→$A, B$ and $C$ are parallel conductors of equal length carrying currents $I, I$ and $2I$ respectively. Distance between $A$ and $B$ is $x$. Distance between $B$ and $C$ is also $x$. ${F_1}$ is the force exerted by $B$ on $A$ and $F_2$ is the force exerted by $B$ on $A$ choose the correct answer
→If the mass of a radioactive sample is doubled, the activity of the sample and the disintegration constant of the sample are respectively
The resistance of a wire of iron is 10 ohms and temp. coefficient of resistivity is $5^{\times 10^{-3} /{ }^{\circ} \mathrm{C}}$ . At $20^{\circ} \mathrm{C}$ it carries 30 milliamperes of current. Keeping constant potential difference between its ends, the temperature of the wire is raised to $120^{\circ} \mathrm{C}$. The current in milliamperes that flows in the wire is
→The magnetic field existing in a region is given by $\vec B\, = {B_0}\,\left[ {1 + \frac{x}{l}} \right]\,\hat k\,A$ square loop of edge $l$ and carrying current $I_0$ , is placed with its edges parallel to the $x-y$ axis . Find the magnitude of the net magnetic force experienced by the loop
→If the luminous intensity of a $100 \,W$ unidirectional bulb is $100 $ candela, then total luminous flux emitted from the bulb is.......$lumen$
→A wire $cd$ of length $l$ and mass $m$ is sliding without friction on conducting rails $ax$ and $by$ as shown. The vertical rails are connected to each other with a resistance $R$ between $a$ and $b$. $A$ uniform magnetic field $B$ is applied perpendicular to the plane $abcd$ such that $cd$ moves with a constant velocity of
→In conductor when electrons move between two collisions, their paths are $... A...$ when external fields are absent and $... B...$ when external filed is present. Here, $A$ and $B$ refer to:
→An electromagnetic wave going through vacuum is described by $\text{E}=\text{E}_0\sin(\text{kx}- \omega\text{t});\text{B}=\text{B}_0\sin(\text{kx}- \omega\text{t}).$ Which of the following equation is true?
→