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Electronic Devices And Circuits
Exercise: Electronic Devices And Circuits
📂 Electronic Devices And Circuits
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Questions for: Electronic Devices And Circuits
The effect of a finite gain of operational amplifier used in an integrator is that
A:
it would not integrator
B:
slope of the O/P will varied with time
C:
final value of the O/P
D:
there will be instability in the cirucuit
Answer:
B
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A JFET behaves as a constant current source when
A:
V
GS
= 0
B:
V
GS
is less than pinch off voltage
C:
V
GS
= V
DS
D:
V
GS
is more than pinch off voltage
Answer:
D
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Electrical contact materials used in switches, brushes and relays must possess
A:
high thermal conductivity and high melting point
B:
low thermal conductivity and low melting point
C:
high thermal conductivity and low melting point
D:
low thermal conductivity and high melting point
Answer:
A
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Which of the following expressions may be used to correctly describe the temperature (T) variation of the intrinsic carrier density (
n
i
) of a semiconductor?
A:
n
i
(T) = (A/T) exp (- E
8
/kT
2
)
B:
n
i
(T) = A (- E
8
/2kT)
10
C:
n
i
(T) = A exp (- E
8
/2kT
2
)
D:
n
i
(T) = AT
3/2
exp (-E
8
/2kT)
Answer:
D
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The drain characteristics of JFET are drawn between
A:
V
GS
and V
DS
for different values of drain current
B:
drain current and V
GS
for different values of V
DS
C:
drain current and V
DS
for different values of V
GS
D:
drain current and V
GS
for one value of V
DS
Answer:
C
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