Recent content by Lamp Guy

How do I find out what the current through R1 is? I thought that since it was parallel with the missing R, it would be 70R/(70+R). I've never worked with switches so I'm pretty confused by them.

182*

i added 70, 50 and 62 to get 183.

I added them up because it said that the current is the same no matter what, so that's how I found the overall current.

Homework Statement The current going through the resistor R1 in the figure does not change whether the two switches S1 and S2 are both open or both closed. The resistances are R1 = 70.00 Ω, R2 = 50.00 Ω, and R3 = 62.00 Ω. The voltage is V = 15 V. With this information, what is the value of...

So in this case, I would take the PE i got for the last charge (1.65E-24 J), multiply it by 8 and divide by 2? Why does the capacitor only store that much?

Sorry, I'm still super confused...I don't see how symmetry plays into this and how to take into account the charge of the particle I'm calculating from, sorry!

Homework Statement Find the Electrostatic potential energy of a cubical configuration of point charges as shown in the figure. Each of the charges is 5.00e and the edge of the cube is 2 cm. (The image is simply a cube with one of the points labeled q) Homework Equations U=kQq/r The Attempt at...