5 of 8 A certain capacitor, in series with a 720- resistor, is being charged. At the end of 0.01 seconds, its charge is haif the final value. The capactance is about OA 90F OC 20 1472F Qunsure
5 of 8 A certain capacitor, in series with a 720- resistor, is being charged. At the end of 0.01 seconds, its charge is haif the final value. The capactance is about OA 90F OC 20 1472F Qunsure
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Transcribed Image Text:5 of 8
A certain capacitor, in series with a 720- resistor, is being charged. At the end of 0.01 seconds, its charge is half the final value. The
capacitance is about
Ob 14 F
OC 20E
14 72F
Ounsure
Transcribed Image Text:| of 8
1:11:48
We place a point charge q at the center of a hypotheticali sphere of radius R This results in an electric field E at the surface of the
sphere and a flux O passing through it. It we change the radius of the sphere to R = 4. what happens to the electric field E'at the
surface and the flux o' passing through this new sphere? A sphere of radius R has surface area A = 4ar and volume V= .
O a E' = and 4 =
O b. E' = 4E and = 84
Oc E' =4 and =
%3D
Od. E' 4E and
Unsure
2 of 8
The electric fleld is uniform in a region of space, as shown in the figure. A, B, and C are points in space. We take a positive point-
charge q (charge 1) from A to C and another positive point-charge particie q (charge 2) from C to B. Which one is true for the work of
electric field done on the particles (respecting the sign of work)?
O a W=-W2
Ob W, > -W2
Oc W <-W
Od W, W:
O. W, > W
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