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Aashish Rohilla
Subject: Physics
, asked on 6/1/18
what does the term dq/dt stand for in case of displacement current
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 6/1/18
Question):- A capacitor and a resistor are connected in series with an a.c. source. If the potential difference across C, R are 120V, 90V respectively and if the r.m.s. current of the circuit is 3A, calculate the-
1. Impedance
2. Power factor of the circuit.
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 6/1/18
An inductor of inductive reactance 50ohm and a 50ohm resistor are connected in series with 220V ,50Hz source . What is the ratio of the voltage across the resistor to the source voltage
Answer
1
Alifa
Subject: Physics
, asked on 29/12/17
In a LCR circuit, = 5 H, c = 80mew F and R= 40 ohms connected to 240V source. Calculate frequency, current and potential drop across the capacitor at resonance.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 25/12/17
No links please
Short Question
Q.5. Show graphically the change of current with the frequency of ac voltage in an LCR series circuit.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 25/12/17
No links please
Short Questions
Q.4. What is the series resonance of an LCR circuit. What is the condition for resonance to occur?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 25/12/17
No links please
Short Questions
Q.3. Normally the alternating voltage and alternating current in an ac circuit are not in phase - explain this.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 25/12/17
No links please
Short Question
Q.2. How does the impedance of an ac circuit depend on the self inductance and capacitance of the circuit?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 25/12/17
No links please
Short Question
Q.1. What do you mean by impedance of an ac circuit?
Answer
1
Nithyashrri Saravanan
Subject: Physics
, asked on 20/12/17
Q. Identify dominating element from the graph
what is 1,2,3 [ either resistor , capacitor , inductor ]
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 18/12/17
14
.
I
n
a
n
a
c
c
i
r
c
u
i
t
,
e
m
f
,
E
=
E
ο
cos
ω
t
a
n
d
c
u
r
r
e
n
t
,
I
=
I
ο
cos
(
ω
t
-
θ
)
.
S
h
o
w
t
h
a
t
,
p
o
w
e
r
d
i
s
s
i
p
a
t
i
o
n
i
n
t
h
e
c
i
r
c
u
i
t
=
1
2
E
ο
I
o
cos
θ
.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 18/12/17
Question : Provide Short answer with no links please:
Establish the condition to get wattless current in ac circuit.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 18/12/17
Question : Give short answer:
What is meant by wattless current ?
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 17/12/17
No links please
Short Questions
Q14. In an ac circuit, emf, E = E
0
cos
ω
t and current, I = I
0
cos (
ω
t –
θ
). Show that, power dissipation in the circult =
1
2
E
0
I
0
cos
θ
.
Answer
1
Shubhrajyoti Ghosh
Subject: Physics
, asked on 17/12/17
Q.13 Establish the condition to get wattless current in an ac circuit.
Answer
2
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Next
What are you looking for?
1. Impedance
2. Power factor of the circuit.
Short Question
Q.5. Show graphically the change of current with the frequency of ac voltage in an LCR series circuit.
Short Questions
Q.4. What is the series resonance of an LCR circuit. What is the condition for resonance to occur?
Short Questions
Q.3. Normally the alternating voltage and alternating current in an ac circuit are not in phase - explain this.
Short Question
Q.2. How does the impedance of an ac circuit depend on the self inductance and capacitance of the circuit?
Short Question
Q.1. What do you mean by impedance of an ac circuit?
Establish the condition to get wattless current in ac circuit.
What is meant by wattless current ?
Short Questions
Q14. In an ac circuit, emf, E = E0 cos t and current, I = I0 cos ( t – ). Show that, power dissipation in the circult = cos .