MCQ
In an intrinsic semiconductor, conductivity is due to:
- ADopin
- ✓Breaking of covalent bonds
- CFree electrons
- DHoles
✓
Answer
Correct option: B.
Breaking of covalent bonds
In intrinsic semiconductors, $n = p$. Hence, at room temperature, no free electrons are available for conduction.
If some energy is supplied to the atoms of intrinsic semiconductor, the covalent bonds will break and electrons will be freed, each electron will leave behind a hole and capture a new hole the process will continued and charge flows through intrinsic semiconductor.
Thus, in intrinsic semiconductor conductivity is due to breaking of covalent bonds.
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
More "M.C.Q (1 Marks)" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→
Similar questions
Diameter of the objective lens of a telescope is $250\, cm$. For light of wavelength $600\, nm$. Coming from a distant object, the limit of resolution of the telescope is close to
→A particle has a mass 400 times than that of the electron and charge is double than that of a electron. It is accelerated by 5V of potential difference. Initially the particle was at rest, then its final kinetic energy will be
The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The dc component of the output voltage is
In the given figure the capacitors ${C_1},{C_3},{C_4},{C_5}$ have a capacitance $4\,\mu F$ each if the capacitor $C_2$ has a capacitance $10\,F$, then effective capacitance between $A$ and $B$ will be.....$\mu F$
→Atomic mass number of an element thorium is 232 and its atomic number is 90. The end product of this radioactive element is an isotope of lead (atomic mass 208 and atomic number 82). The number of alpha and beta particles emitted is
At a certain place the angle of dip is $30^{\circ}$ and the horizontal component of earth's magnetic field is $0.5 G$. The earth's total magnetic field (in $G$ ), at that certain place, is ................
→Consider the two following statements $A$ and $B$ and identify the correct choice given in the answers;
→The work functions of Silver and Sodium are $4.6$ and $2.3 \ eV$, respectively. The ratio of the slope of the stopping potential versus frequency plot for Silver to that of Sodium is :
→The minimum wavelength of X-rays produced by electrons accelerated by a potential difference of volts is equal to
The relation between $a$ and $b$ parameters of current gains for a transistors is given by
→