Exams › NEET › Physics

A pure semiconductor at absolute zero has

1. Absence of electrons in the conduction band.
2. All the electrons occupying the valence band.
3. Large \( E_{g} \) value.
4. All of the above.

Correct answer: All of the above.

Solution

In a pure semiconductor at absolute zero, the valence band is completely filled and the conduction band is empty, so there are no free charge carriers. Also, semiconductors are characterized by a finite band gap, which is large enough to prevent electrons from reaching the conduction band at 0 K.

Related NEET Physics questions

• Which of the following is unipolar transistor?
• Band gap in a semiconductor is of the order
• The transistor are usually made of
• Electric conduction in a semiconductor takes place due to
• The energy band diagrams for three semiconductor sample of silicon are shown. It follows that.
• A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillations of frequency f. If L is doubled and C is changed to 4C, the frequency will be

⚔️ Practice NEET Physics free + battle 1v1 →