Answer the following questions :
1) For the circuit shown find
a- RT
b- IT
c- PT
d- VR2
2K
1K
R1
R4
32V
R2
6K
R3
6K
R5
1200
R6
200
L1
2) For the circuit shown find :
a- LT
b- XLT
0.005mH
6µH
L2
L3
4µH
10KHz
5.2µH
L4
L5
5.2µH
3)For the circuit shown find :
a- CT
b-Total charge (QT)
c- Time constant )‫(ז‬
R
2M
C1
3µF
50V
C2
500nF
1
C3
1µF
1- For the circuit shown find maximum power (Pmax) ?
Rs
100
Vs
40V
RL
2- Find the value and direction of the missing current (I 3), (I 5) by using (KCL) .
I5 =?
I4 = 3A
I3 = ?
I6 = 2A
I2 = 5A
I1 = 3A
3-For the balanced bridge circuit shown find :
123-
R4
IT
VR3
R1
R2
50 100
E= 30V
80
R4
2
R3
By using kirchhoff s laws find currents in each resistor (I 1 , I 2
R3=6K
E1= 36V
R1=12K
R2=9K
3
,
I 3) .
E2 =14V
1- For the waveform shown in fig. find :
V
a)peak to peak voltage (Vp-p) =
20v
b)Root mean square value (Vrms) =
t
t =15 m sec
c)Average value (Vavg) =
-V
d) Period time (T) =
e)The frequency (F) =
f)The wave length (λ) =
g) instantaneous voltage value ei(t) =
t= 1.5ms
2- For the circuit shown find :
a) The current (IR) =
XC
20V
b)The current (IC) =
ƒ= 1KHz
c)The total current (IT) =
d) The impedance (Z) =
e)The phase angle (θ) =
4
5K 
10K
R
For the R L C series circuit shown find :
R
L
127mH
3KΩ
20V
4KΩ
10KHz
a)The impedance (Z) =
b) The total current (IT) =
c)The voltage (VL) =
d)The voltage (Vc) =
e)The phase angle ( θ ) =
f) The apparent power (AP) =
g)The true power (TP) =
h)The reactive power (RP) =
i)The power factor (PF) =
j)What type of this circuit ? (inductive – resistive – capacitive)
5
XC
For the circuit R L C parallel resonance circuit shown find :
50v
R
L
200Ω
C
10mH
40nF
a)The resonance impedance (Zo) =
b)The resonance current (Io) =
c)The resonance frequency (Fo) =
d)The quality factor (Q) =
e)The bandwidth (BW) =
f)The lower frequency (F1) =
g)The upper frequency (F2) =
h)At resonance the type of the circuit is (resistive –inductive – capacitive ) .
6
For the transformer shown find the following :
Ip
500
100
Is = 40mA
Zs
Vp =150V
Vs
a) What type of this transformer ?
b) The primary current (Ip) =
c) The secondary voltage (Vs) =
d)The impedance reflected into the primary (Zp) =
7
20
Answer the following questions :
1) For the circuit shown find :
a- RT
b- IT
c- PT
d- VR2
R4
R2
4K
Vs
R1
8K
6000
R3
6K
6K
R5
16V
2)For the circuit shown find :
a) LT
b) XLT
L1
0.008mH
2µH
L2
2µH
L3
10KHz
L5
4µH
3)For the circuit shown find :
a- CT
b-Total charge (QT)
c- Time constant )‫(ז‬
L4
1µH
R
10G
2µF
c1
c2 4µF
30V
3000nF
8
c3
1- For the circuit shown find maximum power (Pmax):
Rs
30
60V
RL
2- Find the value and direction of the missing current (I 5) by using (KCL) .
I4 = 2A
I3 =1A
I2 = 5A
I1 = 3A
I5 ?
3-For the balanced bridge circuit shown find :
123-
R4
IT
VR3
R1
R2
20
E=50V
50
R4
9
10
R3
By using kirchhoff s laws find the current in each resistor (I 1 , I 2
R2
R1
4K
16K
R3
E1=20V
,
E2 =24V
8K
10
I 3) .
1- For the waveform shown in fig. find :
a)peak to peak voltage (Vp-p) =
V
15V
t
b)Root mean square value (Vrms) =
t = 12 m sec
c)Average value (Vavg) =
-V
d) Period time (T) =
e)The frequency (F) =
f)The wave length (λ) =
g) instantaneous voltage value ei(t) =
t= 3ms
2- For the circuit shown find :
R
a)The impedance (Z) =
2000 
20V
XL
b) The total current (IT) =
1KHz
c)The voltage (VR1) =
d) The voltage (VL) =
e) The phase angle ( θ ) =
11
3K
For the R L C series circuit shown find :
R
6KΩ
40V
L
4KΩ
1.59 nF
50KHz
a)The impedance (Z) =
b) The total current (IT) =
c)The voltage (VL) =
d)The voltage (Vc) =
e)The phase angle ( θ ) =
f) The apparent power (AP) =
g)The true power (TP) =
h)The reactive power (RP) =
i)The power factor (PF) =
j)What type of this circuit ? (inductive – resistive – capacitive)
12
C
For the circuit R L C parallel resonance circuit shown find :
180v
R
L
300Ω
C
100µH
16µF
a) The resonance impedance (Zo) =
b) The resonance current (Io) =
c)The resonance frequency (Fo) =
d)The quality factor (Q) =
e)The bandwidth (BW) =
f)The lower frequency (F1) =
g)The upper frequency (F2) =
h)At resonance the type of the circuit is (resistive –inductive – capacitive ) .
13
For the transformer shown find the following :
250
Ip
500
Is = ?
2A
Vp =?
Zs
Vs
200V
a)What type of this transformer ?
b) The primary voltage (Vp) =
c) The secondary current (Is) =
d) The impedance reflected into the primary (Zp) =
14
60
Answer the following questions :
a)1- For the circuit shown find RT .
2K
1K
R1
R4
R2=6K
R5
R3=4K
1200
R6
RT
200
2-The resistance R in a linear circuit is ( directly – inversely) proportional with current .
L1
0.005mH
b) For the circuit shown find :
1- LT
2- XLT
8µH
10KHz
L2
L5
4µH
L3
L4
2µH
6µH
The inductive reactance ( XL) is directly proportional with ( capacitance – Inductance) .
c) for the circuit shown find :
a- CT
b- Total charge(QT )
500V
d) State sources of electricity:
1- ……………………….
2- ………………………
3- ………………………
4- ………………………
15
C1
C2
1.5F
1000nF
C3
500nF
Answer the following questions :
1- For the circuit shown V2=6V , IT =5A find :
a) I2
b) R3
c) R1
d) Total power (PT)
R3 =?
18V
R1 =?
R2 =3 6V
2- For the circuit shown at maximum power Pmax = 40 mw find :
Rs
a)RL
b)Vs
100
RL
3- What is the frequency (F) at which the inductor (L) of 100 mH and has inductive
reactance (XL) of 3 kΩ.
4- Find the value and direction of the missing current (I 5) by using (KCL) .
I5 =?
I4 = 3A
I6 = 2A
16
I3 = ?
I1 = 3A
I2 = 5A
By using kirchhoff s laws find currents in each resistor (I 1 , I 2
R3=6K
E1= 36V
R1=12K
R2=9K
17
,
I 3) .
E2 =14V
1- For the waveform shown in fig. find :
a)Root mean square value (Vrms) =
V
30v
t
b)Average value (Vavg) =
t=9 msec
-V
c) Period time (T) =
d)The frequency (F) =
e) The wave length (λ) =
2- For the circuit shown find :
a) The current (IRT) =
C 0.2F
b)The current (IC) =
R1
5K 
R2
5K
10V
ƒ= 500Hz
c)The total current (IT) =
d) The impedance (Z) =
e) The voltage (VR1) =
f)The phase angle (θ) =
g)In RC parallel circuit the current (lead- lag) voltage by (90 – 180) degree .
18
For the R L C series circuit shown find :
R
3KΩ
20V
XL
8KΩ
4KΩ
a)The impedance (Z) =
b) The total current (IT) =
c)The voltage (VL) =
d)The voltage (Vc) =
e)The phase angle ( θ ) =
f) The apparent power (AP) =
g)The true power (TP) =
h)The reactive power (RP) =
i)The power factor (PF) =
j)What type of this circuit ? (inductive – resistive – capacitive)
19
XC
For the circuit R L C parallel resonance circuit shown find :
100v
R
L
20Ω
C
20mH
100µF
a)The resonance impedance (Zo) =
b)The resonance current (Io) =
c)The resonance frequency (Fo) =
d)The quality factor (Q) =
e)The bandwidth (BW) =
f)The lower frequency (F1) =
g)The upper frequency (F2) =
h) The phase angle (θ) =
i) At resonance the type of the circuit is (resistive –inductive – capacitive ) .
20
1- For the circuit shown find the following :
a)What type of this filter ?
10nF
10nF
b) The design impedance (Ro) .
0.008 µH
0.016 µH
c)The cut of frequency (Fc) .
d)The high pass filter passes the (low , high) frequencies and block the
(low , high) frequencies .
2- For the transformer shown find the following :
b) What type of this transformer ?
Ip =50mA
Np
6000
Ns
300
Is
Zs
b) The secondary voltage (Vs) =
Vp =150V
c)The secondary current (Is) =
d)The impedance reflected into the primary (Zp) =
e)A transformer is a device to changing (current – energy) from one
potential to another potential .
21
Vs
20
Answer the following questions :
a) For the circuit shown find RT .
R1
R2
R4
4K
6K
R3
6K
8K
6KΩ
R5
RT
The resistance R in a linear circuit is ( directly – inversely) proportional with voltage .
c1
b) For the circuit shown find :
1- CT
2- XCT
6000nF
2µF c2
50KHz
c3 4µF
6µF
c4
The inductive reactance ( XC) is inversily proportional with ( capacitance – Inductance) .
c) for the circuit shown find the time constant () :
3nF
60v
C
R
10GΩ
d) calculate the resistance R of a silver wire has length of (50km) , and has cross
sectional area (20 cm ) ? ( ρ = 1.63x10 Ω. m )
22
Answer the following questions :
1- For the circuit shown V3=6V find :
a) IT
b) R1
c) Total power (PT) .
R1
?
21V
R2
R3
3k
6V
2k
2-- For the circuit shown find :
a) RL
b) maximum power (Pmax)
Rs
60V
30
RL
3- What is the mutual inductance (M) of two inductors having coupling coefficient
(K= 0.5) if their values are 25 mH and 16mH .
4- Find the value and direction of the missing current (I 5) by using (KCL) .
I4 = 2A
I3 =1A
I1 = 3A
23
I2 = 5A
I5 ?
By using kirchhoff s laws find the current in each resistor (I 1 , I 2
R2
R1
4K
16K
R3
E1=20V
,
E2 =24V
8K
24
I 3) .
1- For the waveform shown in fig. find :
a)The root mean square voltage(Vrms)
V
15VP
t
b)Average value (Vavg) =
t = 12 m sec
-V
c) Period time (T) =
d)The frequency (F) =
e) The angular velocity (ω) =
2- For the circuit shown find :
R
a)The impedance (Z) =
2000 
20V
XL
b) The total current (IT) =
c)The voltage (VR1) =
d) The voltage (VL) =
e) The phase angle ( θ ) =
f)In RL series circuit the current (lead- lag) voltage by (90 – 180) degree .
25
3K
For the R L C series circuit shown find :
R
6KΩ
40V
L
4KΩ
1.59 nF
50KHz
a)The impedance (Z) =
b) The total current (IT) =
c)The voltage (VL) =
d)The voltage (Vc) =
e)The phase angle ( θ ) =
f) The apparent power (AP) =
g)The true power (TP) =
h)The reactive power (RP) =
i)The power factor (PF) =
j)What type of this circuit ? (inductive – resistive – capacitive)
26
C
For the circuit R L C parallel resonance circuit shown if (Fo= 10KHz) find :
180v
R
XL
60Ω
?
C
40Ω
a) The capacitance value (C) =
b) The resonance impedance (Zo) =
c) The resonance current (Io) =
d)The quality factor (Q) =
e)The bandwidth (BW) =
f)The lower frequency (F1) =
g)The upper frequency (F2) =
h) The phase angle ( θ ) =
i) At resonance the total reactance (XL-XC) is equal to (zero - infinity) .
27
1- For the circuit shown find the following :
18mH
18mH
a)What type of this filter ?
9µF
b) The design impedance (Ro) .
c)The cut of frequency (Fc) .
d) The low pass filter passes the (low , high) frequencies and block the
(low , high) frequencies .
2- For the transformer shown find the following :
Ip
a)What type of this transformer ?
Np
250
Ns
500
Is =2A
Zs
b) The primary current (Ip) =
Vp =100V
c) The secondary voltage (Vs) =
d) The impedance reflected into the primary (Zp) =
e) A transformer is a device to changing (current – energy) from one
potential to another potential .
28
Vs
60