AIPMT 2005 | Semiconductor Electronics Question 97 | Physics

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AIPMT 2005

MCQ (Single Correct Answer)

-1

Choose the only false statement from the following.

In conductors the valence and conduction bands overlap.

Substances with energy gap of the order of 10 eV are insulators.

The resistivity of a semiconductor increases with increase in temperature.

The conductivity of a semiconductor increases with increase in temperature.

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 2004

MCQ (Single Correct Answer)

-1

In semiconductors at a room temperature

the valence band is partially empty and the conduction band is partially filled

the valence band is completely filled and the conduction band is partially filled

the valence band is completely filled

the conduction band is completely empty

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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