B
BBC
Guest
Why there exists phase difference between current and voltage?
A
Abi Normal
Guest
On May 7, 9:38 am, BBC <ssundar.s...@gmail.com> wrote:
ELI the ICEman cometh!
K
krw@att.bizzzzzzzzzzzz
Guest
On Sat, 7 May 2011 09:29:49 -0700 (PDT), BBC <ssundar.shan@gmail.com> wrote:
change first. Therefor, I (current), in a C(apacitor), comes before E
(voltage).
Current through an inductor cannot change instantaneously. Voltage has to
change first. Therefor E (voltage), in an L(inductance) changes before I
(current).
The old[*] ELI the ICE man.
[*] old == from the days when ice was delivered to the door.
Voltage across a capacitor cannot change instantaneously. Current has to
change first. Therefor, I (current), in a C(apacitor), comes before E
(voltage).
Current through an inductor cannot change instantaneously. Voltage has to
change first. Therefor E (voltage), in an L(inductance) changes before I
(current).
The old[*] ELI the ICE man.
[*] old == from the days when ice was delivered to the door.
B
BBC
Guest
On May 7, 7:57 pm, Abi Normal <abbie.knor...@gmail.com> wrote:
Plz make me understand.....
A
Abi Normal
Guest
On May 7, 12:05 pm, "k...@att.bizzzzzzzzzzzz"
<k...@att.bizzzzzzzzzzzz> wrote:
<k...@att.bizzzzzzzzzzzz> wrote:
Grocery and liquor stores may still have an Eli.
B
BBC
Guest
On May 7, 10:05 pm, "k...@att.bizzzzzzzzzzzz"
<k...@att.bizzzzzzzzzzzz> wrote:
<k...@att.bizzzzzzzzzzzz> wrote:
Thank you for helping me out.
A
Abi Normal
Guest
On May 7, 9:38 am, BBC <ssundar.s...@gmail.com> wrote:
Sorry you didn't like my response. :-(
R
Rich Grise
Guest
BBC wrote:
Hope This Helps!
Rich
Reactance.
Hope This Helps!
Rich
B
BBC
Guest
@rich:can u tell me how the reactance is responsible for phase
difference?
difference?
G
Globemaker
Guest
On May 10, 9:41 am, BBC <ssundar.s...@gmail.com> wrote:
capacitor and reactance of an inductor have units of ohms.
A google search for "reactance is responsible for phase difference?"
found this link:
http://www.allaboutcircuits.com/vol_2/chpt_4/2.html
That resource is approved.
Reactance is not responsible for a phase change. Reactance of a
capacitor and reactance of an inductor have units of ohms.
A google search for "reactance is responsible for phase difference?"
found this link:
http://www.allaboutcircuits.com/vol_2/chpt_4/2.html
That resource is approved.
J
John Fields
Guest
On Tue, 10 May 2011 07:42:21 -0700 (PDT), Globemaker
<alanfolmsbee@cabanova.com> wrote:
It most certainly is.
---
And???
---
By whom?
--
JF
<alanfolmsbee@cabanova.com> wrote:
---
It most certainly is.
---
---
And???
---
---
By whom?
--
JF
B
Baron
Guest
Globemaker Inscribed thus:
--
Best Regards:
Baron.
Now try reading the next page !
--
Best Regards:
Baron.
R
Rich Grise
Guest
BBC wrote:
textbook or your teacher.
Good Luck!
Rich
I _can_, but I think you're either supposed to get that from your
textbook or your teacher.
Good Luck!
Rich
J
John Fields
Guest
On Tue, 10 May 2011 06:41:45 -0700 (PDT), BBC <ssundar.shan@gmail.com>
wrote:
@BBC:
Here, I'll take crack at it:
When a voltage is applied across a conductor and charge starts to
flow, a magnetic field is generated around the conductor which causes
a voltage to be generated in the conductor which opposes the applied
voltage.
This opposition is in addition to the ohmic resistance of the
conductor, and is called "Inductive reactance" or, written
symbolically, "Xl" (X sub L)
Now, since time is nature's way of keeping everything from happening
all at once, the magnetic field doesn't build up instantaneously and,
as a consequence, as the voltage across the inductance varies, the
current through it won't fall in step.
Do you understand?
--
JF
wrote:
---
@BBC:
Here, I'll take crack at it:
When a voltage is applied across a conductor and charge starts to
flow, a magnetic field is generated around the conductor which causes
a voltage to be generated in the conductor which opposes the applied
voltage.
This opposition is in addition to the ohmic resistance of the
conductor, and is called "Inductive reactance" or, written
symbolically, "Xl" (X sub L)
Now, since time is nature's way of keeping everything from happening
all at once, the magnetic field doesn't build up instantaneously and,
as a consequence, as the voltage across the inductance varies, the
current through it won't fall in step.
Do you understand?
--
JF
G
George Herold
Guest
On May 10, 8:00 pm, John Fields <jfie...@austininstruments.com> wrote:
to build circuits and measure things with 'scopes. (and the proper
scope probes) But I can't remember every doing that in college.
George H.
You know, I think the best way to understand about R, C and L might be
to build circuits and measure things with 'scopes. (and the proper
scope probes) But I can't remember every doing that in college.
George H.
J
John Fields
Guest
On Tue, 10 May 2011 19:42:22 -0700 (PDT), George Herold
<gherold@teachspin.com> wrote:
just use SPICE?
--
JF
<gherold@teachspin.com> wrote:
Instead of investing all that time and all those resources, why not
just use SPICE?
--
JF
B
Bill Bowden
Guest
On May 7, 7:38 am, BBC <ssundar.s...@gmail.com> wrote:
the voltage, the capacitor starts charging with maximum current and
minimum voltage across the capacitor. As time passes, the capacitor
voltages increases while the current decreases, since the voltage
across the resistor becomes less and less, and so does the capacitor
current. So, the current and voltage of the capacitor are out of
phase, since one will reach a maximum at the same time the other
reaches a minimum. The capacitor voltage reaches a maximum when the
current is zero, and visa versa. That's 90 degrees. The inductor is
the opposite, where current starts at zero and rises, while the
voltage across the inductor falls.
-Bill
Think about a capacitor charging through a resistor. When you apply
the voltage, the capacitor starts charging with maximum current and
minimum voltage across the capacitor. As time passes, the capacitor
voltages increases while the current decreases, since the voltage
across the resistor becomes less and less, and so does the capacitor
current. So, the current and voltage of the capacitor are out of
phase, since one will reach a maximum at the same time the other
reaches a minimum. The capacitor voltage reaches a maximum when the
current is zero, and visa versa. That's 90 degrees. The inductor is
the opposite, where current starts at zero and rises, while the
voltage across the inductor falls.
-Bill
G
George Herold
Guest
On May 11, 6:01 pm, John Fields <jfie...@austininstruments.com> wrote:
when you unplug the coil at full current in the simulation.
George H.
Hmm, Yeah the difference between a simulation and real life. No arc's
when you unplug the coil at full current in the simulation.
George H.
R
Rich Grise
Guest
John Fields wrote:
I hear and I forget.
I see and I remember.
I do and I understand.
Hope This Helps!
Rich
Confucius say:
I hear and I forget.
I see and I remember.
I do and I understand.
Hope This Helps!
Rich
J
John Fields
Guest
On Wed, 11 May 2011 17:55:48 -0700 (PDT), George Herold
<gherold@teachspin.com> wrote:
Arc is???
Take a look at the top of the coil for a clue.
Version 4
SHEET 1 880 680
WIRE 208 208 96 208
WIRE 304 208 288 208
WIRE 416 208 384 208
WIRE 416 256 416 208
WIRE 96 272 96 208
WIRE 224 272 224 256
WIRE 96 384 96 352
WIRE 224 384 224 352
WIRE 224 384 96 384
WIRE 272 384 272 256
WIRE 272 384 224 384
WIRE 416 384 416 336
WIRE 416 384 272 384
WIRE 96 464 96 384
FLAG 96 464 0
SYMBOL voltage 96 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL voltage 224 256 R0
WINDOW 0 -53 5 Left 0
WINDOW 3 -242 110 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 1 1 1E-6 1E-6 10)
SYMBOL sw 304 208 M270
WINDOW 0 32 15 Left 0
WINDOW 3 32 44 Left 0
SYMATTR InstName S1
SYMBOL res 400 192 R90
WINDOW 0 -35 56 VBottom 0
WINDOW 3 -30 58 VTop 0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL ind 400 240 R0
SYMATTR InstName L1
SYMATTR Value 10
TEXT 104 408 Left 0 !.model SW SW(Ron=1 Roff=1e9 Vt=0.5Vh=0)
TEXT 102 440 Left 0 !.tran 20 startup
--
JF
<gherold@teachspin.com> wrote:
---
Arc is???
Take a look at the top of the coil for a clue.
Version 4
SHEET 1 880 680
WIRE 208 208 96 208
WIRE 304 208 288 208
WIRE 416 208 384 208
WIRE 416 256 416 208
WIRE 96 272 96 208
WIRE 224 272 224 256
WIRE 96 384 96 352
WIRE 224 384 224 352
WIRE 224 384 96 384
WIRE 272 384 272 256
WIRE 272 384 224 384
WIRE 416 384 416 336
WIRE 416 384 272 384
WIRE 96 464 96 384
FLAG 96 464 0
SYMBOL voltage 96 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL voltage 224 256 R0
WINDOW 0 -53 5 Left 0
WINDOW 3 -242 110 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 1 1 1E-6 1E-6 10)
SYMBOL sw 304 208 M270
WINDOW 0 32 15 Left 0
WINDOW 3 32 44 Left 0
SYMATTR InstName S1
SYMBOL res 400 192 R90
WINDOW 0 -35 56 VBottom 0
WINDOW 3 -30 58 VTop 0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL ind 400 240 R0
SYMATTR InstName L1
SYMATTR Value 10
TEXT 104 408 Left 0 !.model SW SW(Ron=1 Roff=1e9 Vt=0.5Vh=0)
TEXT 102 440 Left 0 !.tran 20 startup
--
JF