MCQ
Semiconductor is damaged by the strong current due to
- ALack of free electron
- ✓Excess of electrons
- CExcess of proton
- DNone of these
✓
Answer
Correct option: B.
Excess of electrons
b
(b)When a strong current passes through the semiconductor it heats up the crystal and covalent bond are broken. Hence because of excess number of free electrons it behaves like a conductor.
(b)When a strong current passes through the semiconductor it heats up the crystal and covalent bond are broken. Hence because of excess number of free electrons it behaves like a conductor.
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
In absorption spectrum of $Na$ the missing wavelength $(s)$ are
→A current of $1\,A$ is flowing on the sides of an equilateral triangle of side $4.5\times10^{-2}\,m$ . The magnetic field at the centre of the triangle will be
→Assertion : Short wave bands are used for transmission of radio waves to a large distance.
Reason : Short waves are reflected by ionosphere
Reason : Short waves are reflected by ionosphere
If in compound microscope $m_1$ and $m_2$ be the linear magnification of the objective lens and eye lens respectively, then magnifying power of the compound microscope will be
→An electron moving with a speed $u$ along the positive $x-$axis at $y = 0$ enters a region of uniform magnetic field $\overrightarrow B = - {B_0}\hat k$ which exists to the right of $y$-axis. The electron exits from the region after some time with the speed $v$ at co-ordinate $y$, then
→Work done to bring a unit positive charge from infinity to a point in an electric field is known as $......$?
→Out of dia, para and ferromagnetism, the universal property of all substances is:
In Young's double slit experiment, white light is used. The separation between the slits is $ b. $ The screen is at a distance $d (d>> b)$ from the slits. Some wavelengths are missing exactly in front of one slit. These wavelengths are
→A charge ${q_1}$ exerts some force on a second charge ${q_2}$. If third charge ${q_3}$ is brought near, the force of ${q_1}$ exerted on ${q_2}$
→The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is $10\, \Omega$. The current in the circuit will be now
→