Why current leads the voltage in case of capacitor load?
Why voltage leads the current in case of inductive load?
Why both are with in phase in case of restive load?
- 3 Answers
- 5772 Views
- TATA, I also Faced
- E-Mail Answers
Answer Posted / keerthana
The reason that current leads voltage in a capacitor is
rooted in the way a capacitor works. Picture the capacitor.
It's basically two conductive plates separated by a short
distance and having a dielectric (insulator) between them.
Now, let's specify that our cap (capacitor) is completely
discharged and we'll hook it up to a DC voltage source
through a switch. Flip the switch on and current will begin
to flow, but it is important to look at what happens in just
the first instant of time. Electrons will begin to
accumulate on the negative plate and their presence there
will drive electrons off the positive plate. The capacitor
is building up a charge. It is developing a voltage across
(or between, if you prefer) the plates. But electrons have
to begin to pile onto the plate to actually create the
difference of potential (voltage) between the plates. The
moving electrons (and that's current) that are piling on the
plate are already beginning to flow before the voltage is
developed between the plates, so current is said to lead
voltage in a capacitor.
| Is This Answer Correct ? | 7 Yes | 3 No |
Post New Answer View All Answers
how to wiring it with contactor and timer together
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.
What happens to voltage when current through the inductor is constant?
how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
ELECTRICAL ENGINEER TEST IN FEWA ANY ONE HAVE KNOWLEDGE ABOUT THIS?????????
Why earthing is necessary for any equipment?
how do you test tachos and servos
diff. between tension mode & speed mode
What are the criteria shall be considers for sizing Fuse and MCB? If the rated current is 10Amps what should be the fuse size / MCB Size?
Define load factor?
how can see the ac indoor or out door ac which Tr
At what factor resistance r of a conductor depends?
How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke
