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
Radiowaves of constant amplitude can be generated with
FET
filter
rectifier
oscillator
The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10V. The DC component of the output voltage is
10V
Barrier potential of a p-n junction diode does not depend on
forward bias
doping density
diode design
temperature
A semiconducting device is connected in a series in circuit with a battery and a resistance. A current is allowed to pass through the circuit. If the polarity of the battery is reversed, the current drops to almost zero. The device may be:
a p-n junction
an intrinsic semiconductor
a p-type semiconductor
an n-type semiconductor
For a given circuit of ideal p-n junction diode, which of the following is correct?
In forward biasing the voltage across R is V
In reverse biasing the voltage across R is V
In forward biasing the voltage across R is 2V
In reverse biasing the voltage across R is 2V
The truth table given below
represents
AND gate
NOR gate
OR gate
NAND gate
When n-type semiconductor is heated
number of electrons increases while that of holes decreases
number of holes increases while that of electrons decreases
number of electrons and holes remain same
number of electrons and holes increases equally
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
90
10
1.25
100
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
