Electrical Engineering - Capacitors - Discussion
Discussion Forum : Capacitors - General Questions (Q.No. 22)
22.
An uncharged capacitor and a 1 k
resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor isDiscussion:
12 comments Page 1 of 2.
Rathi said:
1 decade ago
Yes, the capacitor takes some time to charge.
Mani said:
1 decade ago
Voltage across the capacitor cannot change immediately since, it requires infinite current to flow. This is physically impossible. (i=C dv/dt). Since, before closing the switch voltage across the capacitor is ZERO and at the instant switch has been closed also voltage across the capacitor is ZERO.
Sanjeev said:
1 decade ago
For DC source its act as open.
RAHIM SHEIKH said:
10 years ago
Actually voltage across capacitor can not change instantaneously so in this change case answer is zero.
Stuti kushwaha said:
10 years ago
C does not allow the sudden change in voltage so here at t = (0-) C have no charge it is given in question then at t = (0+) C behave like a short circuit and we know that short circuit have 0 voltage.
Shubham said:
9 years ago
The capacitor rating is independent of voltage hence it's zero.
Siri said:
8 years ago
Is capacitor works under DC?
Shadan said:
7 years ago
Q=CV,
V=Q/C,
Because capacitor is uncherged soQ=0 c.
So V=Q/C= 0/C =0V.
V=Q/C,
Because capacitor is uncherged soQ=0 c.
So V=Q/C= 0/C =0V.
Hassan said:
6 years ago
Here it's using DC source (battery) so the circuit will act like open.
(1)
Waseem khan said:
6 years ago
For DC source, capacitor act like open.
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