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Kurian J
Subject: Physics
, asked on 1/3/18
What is inductance and inductive ractance ??
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
Solve this:
36.
An alternating voltage of 220 V applied across a device X makes a current of 0.5 A flow through it and is in phase with the applied voltage. When the same device X is used in series combination with another device Y and connected to the same source, the power factor is found to be 1/√2.
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
in DC circuit the potential difference across series combination of number of circuit element is equal to sum of potential difference across individual elements the same is not true for ac circuit explain
Answer
1
Shivam Sharma
Subject: Physics
, asked on 28/2/18
Solve this:
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Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
22
22.
What is the average value of the a.c, voltage represented by V = 220 sin 314 t volts over the time interval
(
i
)
0
t
o
π
ω
?
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)
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ω
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
21
Q. A 100 ohm resistance is connected across an alternating potential V = 200 sin (100
π
t).
Calculate time taken by the current to change from its peak value to rms value. What will be the rms value of current?
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
show mathematically that the current flowing through an ideal inductor is wattless current
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
would the generator work in the coil were held stationary and pole pieces rotated with same speed as earlier
Answer
1
Varnika Dhiman
Subject: Physics
, asked on 28/2/18
Frequency of direct current is zero. Why ?!..
Answer
2
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
Solve this:
Q.4. Distinguish between reactance and impedance. When a series combination of a coil of inductance L and a resistance R is connected across a 20 V, 50 Hz supply, a current of 0.5 A flows through the circuit. The current differs in phase from the applied voltage by
π
/
3
. Calculate the value of L and R.
Answer
1
Aashish Rohilla
Subject: Physics
, asked on 28/2/18
in a series LCR AC circuit the potential difference across resistor and capacitor is 20 volt each and across the inductor is 40 volt what is the power factor of the circuit
Answer
1
Anushka Ranaut
Subject: Physics
, asked on 26/2/18
Qn 1 please
1.
In an a.c circuit, the instantaneous voltage and current are V = 200 sin 300 t volt and I = 8 cos 300 t ampere respectively. Is the nature of the circuit capacitive or inductive ? Give reason .
Answer
1
Yatharth
Subject: Physics
, asked on 25/2/18
How capacitor and inductor store energy
Answer
1
Yatharth
Subject: Physics
, asked on 25/2/18
???
Answer
1
Ashwini.. .
Subject: Physics
, asked on 25/2/18
Solve this:
Answer
1
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What are you looking for?
36. An alternating voltage of 220 V applied across a device X makes a current of 0.5 A flow through it and is in phase with the applied voltage. When the same device X is used in series combination with another device Y and connected to the same source, the power factor is found to be 1/√2.
22. What is the average value of the a.c, voltage represented by V = 220 sin 314 t volts over the time interval
Q. A 100 ohm resistance is connected across an alternating potential V = 200 sin (100t).
Calculate time taken by the current to change from its peak value to rms value. What will be the rms value of current?
Q.4. Distinguish between reactance and impedance. When a series combination of a coil of inductance L and a resistance R is connected across a 20 V, 50 Hz supply, a current of 0.5 A flows through the circuit. The current differs in phase from the applied voltage by . Calculate the value of L and R.
1. In an a.c circuit, the instantaneous voltage and current are V = 200 sin 300 t volt and I = 8 cos 300 t ampere respectively. Is the nature of the circuit capacitive or inductive ? Give reason .