Electrical Engineering - Inductors - Discussion
Discussion Forum : Inductors - General Questions (Q.No. 10)
10.
An inductor, a 1 k
resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage isDiscussion:
25 comments Page 2 of 3.
Dinesh diny said:
1 decade ago
I agree with @Soumya sen. Here we're considering transient condition. Thus inductor is open. Hence voltage across inductor is 6V. Current=0 ==>voltage drop across resistor is 0.
Upendra said:
1 decade ago
The inductor property is opposes to sudden changing current does not opposes voltage so total voltage appear across it.
Sharanappa said:
1 decade ago
Current is given by i = I(1-e^Rt/L),
When t=0, i= 0,
Emf = L*di/dt.
So voltage is zero. Answer is A.
When t=0, i= 0,
Emf = L*di/dt.
So voltage is zero. Answer is A.
Santy said:
1 decade ago
Though it is DC source. At 0 instant the voltage will bot be 6 V.
The voltage has to raise from 0 to 6 volts, which is change in voltage. This change is not acceptable by the inductor. Hence initially the inductor acts as a open circuit.
The voltage has to raise from 0 to 6 volts, which is change in voltage. This change is not acceptable by the inductor. Hence initially the inductor acts as a open circuit.
Manoj said:
1 decade ago
For DC source inductor act as sort circuit the voltage is zero.
Hiren said:
10 years ago
Under transient condition (Here:-closing of switch) inductor behaves like open circuit so voltage across inductor is 6.
After than current in the circuit gradually increase and after finite time inductor behaves short circuit so that voltage across it 0.
After than current in the circuit gradually increase and after finite time inductor behaves short circuit so that voltage across it 0.
Stuti said:
10 years ago
Here we know from transient analysis that when switch is on (t=0) then initially inductor behave like a open circuit. So no current flow through the circuit because of open circuit therefore no we drop across are and input we appear across L.
Rohul Amin said:
8 years ago
At t=0s ; f is infinite , and XL = 2pfL, hence XL is infinite.
Means open circuit.
Hence, the total voltage will be across an inductor and hence 6v.
Means open circuit.
Hence, the total voltage will be across an inductor and hence 6v.
Arka Ghatak said:
8 years ago
The Answer is 6v as there is no back EMF produced by the current in the inductor when we just close the switch.
Parth said:
8 years ago
As according to AC formula, V=Vm(1-e^-rt\L) for RL circuit the value of voltage at inductor will be zero, for the instant when switch is closed dc will behave same as AC.
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