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1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-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
A
2.54 $$\mathop A\limits^ \circ $$
B
3.59 $$\mathop A\limits^ \circ $$
C
1.27 $$\mathop A\limits^ \circ $$
D
5.08 $$\mathop A\limits^ \circ $$
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
In a p-n junction photo cell, the value of the photo-electromotive force profuced by monochromatic light is proportional to
A
The barrier voltage at the p-n junction.
B
The intensity of the light falling on the cell.
C
The frequency of the light falling on the cell.
D
The voltage applied at the p-n junction.
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-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
A
(10/$$\sqrt 2 $$) V
B
$$\left( {{{10} \over \pi }} \right)V$$
C
10 V
D
(20/$$\pi $$) V
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
In semiconductors at a room temperature
A
the valence band is partially empty and the conduction band is partially filled
B
the valence band is completely filled and the conduction band is partially filled
C
the valence band is completely filled
D
the conduction band is completely empty
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