Copper has face-centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å. The value of lattice constant for this lattice is
1.27Å
5.08Å
2.54Å
3.59Å
The truth table belongs to which of the following gate?
NOR
XOR
NAND
OR
Si and Cu are cooled to a temperature of 300 K, then resistivity
for Si increases and for Cu decreases
for Cu increases and for Si decreases
decreases for both Si and Cu
increases for both Si and Cu
If the lattice parameter for a crystalline structure is 3.6Å, then the atomic radius in fcc crystals is
1.81Å
2.10Å
2.92Å
The transfer ratio β of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1kΩ. The peak value of the collector AC current for an AC input voltage of 0.01V peak is :
100 μA
0.01 mA
0.25 mA
500 μA
At absolute zero, Si acts as
non-metal
metal
insulator
None of these
In a p-n junction photo cell, the value of the photo-electromotive force produced 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
In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table
A B Y
0 0 0
0 1 0
1 0 0
1 1 1
0 0 1
0 1 1
1 0 1
1 1 0
If a full wave rectifier circuit is operating from 50Hz mains; the fundamental frequency in the ripple will be
70.7Hz
100Hz
25Hz
59Hz
If internal resistance of cell is negligible, then current flowing through the circuit is
