AIPMT 2005 | Semiconductor Electronics Question 91 | Physics

AIPMT 2005

MCQ (Single Correct Answer)

-1

Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54 $$\mathop A\limits^ \circ $$. The value of lattice constant for this lattice is

2.54 $$\mathop A\limits^ \circ $$

3.59 $$\mathop A\limits^ \circ $$

1.27 $$\mathop A\limits^ \circ $$

5.08 $$\mathop A\limits^ \circ $$

AIPMT 2005

MCQ (Single Correct Answer)

-1

Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (E_g)_C, (E_g)_si and (E_g)_Ge respectively. Which one of the following relationships is true in their case?

(E_g)_C > (E_g)_Si

(E_g)_C < (E_g)_Si

(E_g)_C = (E_g)_Si

(E_g)_C < (E_g)_Ge.

AIPMT 2005

MCQ (Single Correct Answer)

-1

Zener diode is used for

amplification

rectification

stabilisation

producing oscillations in an oscillator.

AIPMT 2005

MCQ (Single Correct Answer)

-1

Application of a forward bias to a p-n junction

widens the depletion zone

increases the potential difference across the depletion zone

increases the number of donors on the n side

decreases the electric field in the depletion zone.

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