Advertisements
Advertisements
Question
In an n-type silicon, which of the following statement is true:
Options
Electrons are majority carriers and trivalent atoms are the dopants.
Electrons are minority carriers and pentavalent atoms are the dopants.
Holes are minority carriers and pentavalent atoms are the dopants.
Holes are majority carriers and trivalent atoms are the dopants.
Advertisements
Solution
Holes are minority carriers and pentavalent atoms are the dopants.
Explanation:
In an n-type silicon, the electrons are the majority carriers, while the holes are the minority carriers. An n-type semiconductor is obtained when pentavalent atoms, such as phosphorus, are doped in silicon atoms.
RELATED QUESTIONS
Answer the following question.
Three photodiodes D1, D2, and D3 are made of semiconductors having band gaps of 2.5 eV, 2 eV, and 3 eV respectively. Which of them will not be able to detect light of wavelength 600 nm?
In the case of metals, the valence and conduction bands ______.
In the case of semiconductors, the valence and conduction bands ______.
Doping of semiconductor is the process of ______.
The energy band gap is maximum in
The electrons in the conduction band of a semiconductor are
Explain why elemental semiconductor cannot be used to make visible LEDs.
ASSERTION (A): The electrical conductivity of a semiconductor increases on doping.
REASON (R): Doping always increases the number of electrons in the semiconductor.
The energy band gap of semiconducting material to produce violet (wavelength = 4000 Å).
LED is ______ eV. (Round off to the nearest integer)
When a diode is forward biased, it has a voltage drop of 0.5 V. The safe limit of current through the diode is 10 mA. If a battery of emf 1.5 V is used in the circuit, the value of minimum resistance to be connected in series with the diode so that the current does not exceed the safe limit is ______.
Draw an energy band diagram for a p-type semiconductor at T > 0 K.
