Homework Statement
To concentric metal spherical shells , of radius a and b , respectively , are separated by weakly conducting material of conducting sigma
a) If they are maintained at a potential difference V, what current flows from one to the other?
Homework Equations
V=-\intE *dl
V=IRThe...
Homework Statement
A rectangular loop of wire is situated so that one end (height h) is between the plates of a parallel plate capacitor, oriented parallel to the field E. The other end is way outside , where the field is essentially zero. What is the emf in the loop? If the total...
In an electric current there must be forces that push electrons in a general direction (current). My question is, what creates this force (electromotive force)?
I assume that this force, that moves electrons, is created by a surplus of electrons in one area. Perhaps they move because the...
Hi everybody!
I'm a physics-interested guy from Norway, who have a question. We don't have any such exellent forums in Norway. :-) I hope you understand my english by the way. :-)
Homework Statement
We have a battery with internal resistance 2 Ohm. The voltmeter shows 9 volt when no...
help me with this please... i just couldn't get it.
1) a complete circuit consists of a 12.0 V battery with a 4.50 ohm resistor and switch. the internal resistance of the battery is 0.30 ohms when switch is open. what does the voltmeter read when placed:
a. across the terminal of the...
Here are my homework problems. I did most of them, but I don't understand how to do the others.
1. A rod of length 0.40 m moves in a magnetic field of magnitude B=1.2 T. The emf induced in the moving rod is found to be 2.40 V.
a)what is the speed of the rod?
b)if the total circuit...
If I have a rectangular coil with no current flowing on it traveling at a velovity v; and I have an infinetely long wire with a constante current i on the same plane of the rectangular coil which velocity v is perpendicular to the wire, is the lorenz force equal to zero because I have only...