MCQ
At room temperature, a $P-$ type semiconductor has
- ✓Large number of holes and few electrons
- BLarge number of free electrons and few holes
- CEqual number of free electrons and holes
- DNo electrons or holes
✓
Answer
Correct option: A.
Large number of holes and few electrons
a
(a)In $P-$ type semi conductor, holes are majority charge carriers.
(a)In $P-$ type semi conductor, holes are majority charge carriers.
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 the figure shown, a circuit contains two identical resistors with resistance $R = 5\,\Omega $ and an inductance with $L = 2\, mH$. An ideal battery of $15\, V$ is connected in the circuit. What will be the current through the battery long after the switch is closed?......$A$
→A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle θ at the centre. The value of the magnetic induction at the centre due to the current in the ring is
The electric current in a circular coil of four turns produces a magnetic induction $32\,T$ at its centre. The coil is unwound and is rewound into a circular coil of single turn, the magnetic induction at the centre of the coil by the same current will be $..........\,T$
→$A$ curren of $2\,A$ is increasing at $a$ rate of $4\, A/s$ through a coil of inductance $2\,H$. The energy stored in the inductor per unit time is....$J/s$
→When current is passed in antimony-bismuth couple, then
Match the List I with the List II from the combination shown. In the left side (List I) there are four different conditions and in the right side (List II), there are ratios of heat produced in each resistance for each condition :
| List I | List II | ||
| (I) | Two wires of same resistance are connected in series and same current is passed through them | (A) | 1 : 2 |
| (II) | Two wires of resistance R and 2R ohm are connected in series and same P.D. is applied across them | (B) | 4 : 1 |
| (III) | Two wires of same resistance are connected in parallel and same current is flowing through them | (C) | 1 : 1 |
| (IV) | Two wires of resistances in the ratio 1 : 2 are connected in parallel and same P.D. is applied across them | (D) | 2 : 1 |
If a proton and anti-proton come close to each other and annihilate, how much energy will be released
Find magnetic field at centre $P$ if length of side of square loop is $20\, cm$
→Let $\mathrm{F}_{\mathrm{pp}}, \mathrm{F}_{\mathrm{pn}}$ and $\mathrm{F}_{\mathrm{nn}}$ fill denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. When the separation is $1fm:$
→Stars are twinkling due to