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elica85
Group Title
the potential as a function of position x is shown in the graph...
 2 years ago
 2 years ago
elica85 Group Title
the potential as a function of position x is shown in the graph...
 2 years ago
 2 years ago

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elica85 Group TitleBest ResponseYou've already chosen the best response.1
dw:1332350001701:dw
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
i tried to draw a smooth curve
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
is the electric field zero at x=0? is the max magnitude at 15 or 5cm?
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
Electric Field is defined as \[E=\frac{dv}{dx}\] v= potential so E is the negative of the slope of the potential curve. Do note that E found from this relation is the E in x  direction. At x=0 the curve is parallel to x axis, that is it's constant so E=0 At x=5 the slope is negative and magnitude wise the highest. So E will be max at x=5 cm
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
how do you determine that the curve is parallel to x axis @ x=0? it doesn't look like it on my graph but in the actual graph, it looks parallel at x=10 too
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
i assumed E was zero at x=0 since d(v=0) should be zero so E=(d0)/dx=0
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
No if v=0 doesn't mean that E=0 but the negative of slope of V is E, Yeah at x=10 also the slope is zero. So there also E is zero
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
hmm still confused. i need the negative of the slope of V to find where E is zero? or to find the max magnitude? and which direction is the E at the max point?
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
dw:1332352015313:dw is this what the graph of E look like?
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
Ok Elica, Yeah Electric field is the negative of the voltage's slope. When we have Voltage constant or parallel to axis. Then it's slope is zero and consequently E is zero
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
ok i understand. so is the graph i did for E right?
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
If V is cos then E will be sine
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
x=0, v=constant so E will be zero
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
ok so it's not right. how do i determine the direction of E at x=0 or x=10?
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
dw:1332352349621:dw
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
E is in the x direction always:)
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
so right either way
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
Yeah, when E is negative that means it's in x direction
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
thank you so much
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.2
Welcome, Did you understand?
 2 years ago

elica85 Group TitleBest ResponseYou've already chosen the best response.1
yes, that was great help
 2 years ago
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