MCQ
$P-$type semiconductors are made by adding impurity element
- A$As$
- B$P$
- ✓$B$
- D$Bi$
✓
Answer
Correct option: C.
$B$
c
(c)Because boron is a trivalent impurity.
(c)Because boron is a trivalent impurity.
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 bulb has specification of one kilowatt and 250 volts, the resistance of bulb is
A $220 \; V , 50 \; Hz$ AC source is connected to a $25 \; V$, $5 \; W$ lamp and an additional resistance $R$ in series (as shown in figure) to run the lamp at its peak brightness, then the value of $R$ (in ohm) will be
→The focal length of a convex mirror is $20\, cm$ its radius of curvature will be.....$cm$
→Identify the definition of sensitivity of a galvanometer from the following.
If the $Q$ value of an endothermic reaction is $11.32\ MeV$, then the minimum energy of the reactant nuclei to carry out the reaction is $($in laboratory frame of reference$)$
→A planet of mass M has a satellite of mass m, revolving around the planet in a circular orbit of radius r and time period T. The mass (M) of the planet is
A conducting ring is placed around the core of an electromagnet as shown in fig. When key K is pressed, the ring
A common example of alpha decay is ${ }_{82}^{238} U \longrightarrow{ }_{80}^{234} Th +{ }_2 He ^4+ Q$. ( Given : ${ }_{92}^{238} U =238.05060 u ,$ ${ }_{90}^{234} Th =234.04360 u ,$ ${ }_2^4 He =4.00260 u \text {, and }$ $1 u =931.5 \frac{ MeV }{ c ^2} )$. The energy released $(Q)$ during the alpha decay of ${ }_{92}^{238} U$ is $......\,MeV$
→The angular magnification of a simple microscope can be increased by increasing
In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy $E_0$ and the radius $r_0$ of the first orbit will be ($a_0$ is the Bohr radius)
→