AIPMT 2005 | Semiconductor Electronics Question 91 | Physics

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

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

In a p-n junction photo cell, the value of the photo-electromotive force profuced by monochromatic light is proportional to

The barrier voltage at the p-n junction.

The intensity of the light falling on the cell.

The frequency of the light falling on the cell.

The voltage applied at the p-n junction.

AIPMT 2004

MCQ (Single Correct Answer)

-1

The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d.c. component of the output voltage is

(10/$$\sqrt 2 $$) V

$$\left( {{{10} \over \pi }} \right)V$$

10 V

(20/$$\pi $$) V

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