Question Bank - F.Y B.Sc Semester - 2

Electronics - Devices

Oct 7, 2013 (5 years and 3 months ago)

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PROF
. V. A. BHEDA

SEMESTER
-
I I
UNIT No.
-
01 ELECTRIC & ELECTRONIC CIRCUITS

CH
-
No.
-
01

D.C. CIRCUITS

Que
-
1 obtain the expression for the gro
wth of charge on capacitor at time t in R
-
C series circuit

with

D.C. source

Que
-
2 obtain the expression for the decay of charge on capacitor at time t in R
-
C series circuit with

D.C. source

Que
-
3 What is the time constant in the case of charging and disc
harging position in R
-
C series circuit

?

Que
-
4 Show that the unit of time

constant is second

Que
-
5 Show that the increasing charge on C in R
-
C circuit to rise 95% of it is maximum value in a

time interval equal to 3 time constant
[take
]

Que
-
6 Find out the heat energy dissipated
from the resistance for t
he time during which the

charge

becomes zero from maximum in the decreasing charge condition at time t

Que
-
7 obtain the expression for the growth of current at time t

in R
-
L

series circuit with D.C. source

Que
-
8 obtain the expression for the decay of current at time t

in R
-
L

series circuit with D.C. source

Que
-
9 What is the time constant in the case of increasing current and decreasing current in R
-
L

series circuit
?

Que
-
10 A resistance R and an inductor L are connected in series with a battery of V volt. Calculate

the w
ork done by the battery for a time du
ring which the current become maximum

Que
-
11 Find out the heat energy dissipated from the resistance for the time during which the current

becomes zero from maximum in the decreasing current condition at time t

Que
-
1
2 Obtain the se
cond order differential equation for the growth of charge on a capacitor in R
-
L
-
C

circuit with D.C. source and Sole it

s

Que
-
13 Write the second order differential equation for the growth of charge on a capacitor in R
-
L
-
C

circuit with D.C. source and Sole it’s

Que
-
14 Write the second order differential equation for the growth of charge on a capacitor in R
-
L
-
C

circuit with D.C. source and Sole it’s

Que
-
15 Define Ohm law

Que
-
16 Define Kirchhoff law

Que
-

Que
-
18 What is principle of condenser

Que
-
1
9

What is unit of capacity

Que
-
20 What is principle of inductor

Que
-
21 What is unit of inductance

Que
-
22 What do you mean by Time constant

Que
-
23 Write down of growth of charge in R
-
C series circuit

Que
-
24 Write down of decay of charge in R
-
C series circuit

Que
-
25 Write down of growth of current in R
-
L series circuit

Que
-
26 Write down of decay of current in R
-
L series circuit

Que
-
27 Define

Henr
y

Que
-
28 What is the physical significance of quality

factor a capacitor

Que
-
29 What is the physical significance of quality factor an inductor

Que
-
30

What is full form of A.F.O

Que
-
31 What is sliding effect
?

Que
-
32 What is rectifier Write type
?

Que
-
33 What is ripple factor

Que
-
34 What is value of ripple factor half wave rectifier

Que
-
35 What is value of ripple factor full wave rectifier

Que
-
34 What is value of
efficiency of half wave rectifier

Que
-
34 What is value of
efficiency of
full wave rectifier

Que
-
35 What is prop
erty of a choke is used in filtering

Que
-
36 Write use of Schering bridge

Que
-
37 Write use of Wein bridge

Que
-
38 What is rectification
?

CH
-
No.
-
0
2

A.C. CIRCUITS

Que
-
1 Explain the method to determine value of an inductance by

M
axwell

bri
dge

Que
-
2 Draw the circuit diagram of Schering bridge to find out of value capacitance

Que
-
3 Draw the circuit diagram of Hay bridge to find out of value an inductance for high value Q

Que
-
4 Draw the circuit diagram of Wein bridge to f
ind out

frequency of A
.C. source

CH
-
No.
-
0
3

DIODE CIRCUITS

Que
-
1 Draw the circuit diagram of half wave rectifier. Draw its input and output waves and explain its

working

Que
-
2 Draw the circuit diagram of full wave rectifier. Draw its input and output waves and explain its

working

Que
-
3 Obtain the equation for half wave rectifier output D.C
. current
,
output D.C
.
voltage
,

Ripple factor and RMS value

Que
-
4 Obtain the equation for full wave rectifier output D.C
. current
,
output D.C
.
voltage
,

Ripple factor and RMS value

Que
-
5 Prove that for half wave rectifier ripple factor is 1.21.

Que
-
6 Show that maximum efficiency of half wave rectifier is 40.6%

Que
-
7 Prove that for full wave rectifier

ripple factor is 0.482.

Que
-
8 Show that maximum efficiency of
full

wave rectifier is 81.2%

Que
-
9 Explain the working of a bridge rectifier.

Que
-
10 Explain the importance of filter circuit in rectifier

Que
-
11 Draw the circuit diagram of full wave rectifie
r with inductor

filter and obtain formula for ripple

factor

Que
-
12 Draw the circuit diagram of full wave rectifier with capacitor filter and obtain formula for ripple

factor