The valence of an impurity added to germanium crystal in order to convert it into a P-type semiconductor is :
Correct answer: D. 3
- A. 6
- B. 5
- C. 4
- D. 3
Explanation
To convert a germanium crystal into a P-type semiconductor, an element with a valence of 3, such as boron, is added. This type of impurity accepts electrons, creating holes that facilitate positive charge carrier movement, hence forming a P-type semiconductor. Other options are incorrect: elements with a valence of 5 donate electrons, forming N-type semiconductors, while elements with valences of 4 and 6 do not effectively alter the conduction type of the semiconductor.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electronics
A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
Practise Electronics
660 free Electronics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electronics questions
When P-N junction diode is forward biased then:
The process of converting an alternating current waveform into a direct current waveform is referred to as:
Which of the following is NOT a basic operation of Boolean variables:
If Np and Ne be the numbers of holes and conduction electrons in an extrinsic semiconductor, then:
A semiconducting device connected in series with a cell and a resistor indicates some current in the circuit. If the polarity of the battery is reversed, the current almost reduces to zero. The device may be:
Assertion: In n-type semiconductors electrons are the majority charge carriers and holes are the minority charge carriers.Reason: n-type semiconductor is electrically neutral.