1
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The probability that an electron in a metal occupies the Fermi-level at any temperature (> 0 K)
A
$$0$$
B
1
C
0.5
D
1.0
2
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The drift velocity of electrons in silicon
A
is proportional to the electric field for all values of electric field
B
is independent of the electric field
C
increases at low values of electric field and decreases at high values of electric field exhibiting negative differential resistance.
D
increases linearly with electric field at low values of electric field and gradually saturates at higher values of electric field.
3
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
The diffusion potential across a P-N junction
A
decreases with increasing doping concentration
B
increases with decreasing band gap
C
does not depend on doping concentration
D
increases with increase in doping concentrations
4
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
A zener diode works on the principle of
A
tunneling of charge carriers across the junction
B
thermo ionic emission
C
diffusion of charge carriers across the junction
D
hopping of charge carriers across the junction
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