Homework Statement
Graph of current vs voltage. What is happening to the resistance after the linear portion of the graph and why.
Homework Equations
none
The Attempt at a Solution
the line is the resistance and it follows ohms law for a while (it is constant and independent...
After seeing contradictory posts on many forums , and getting differing opinions from my teachers , I'm completely lost with the ohms law...
I have a number of questions. Can someone please answer them for me?
1) Do semiconductors obey Ohms law? and why do they obey/not obey?
if they obey...
Homework Statement
Define resistance and resistivity? A 30W, 6A bulb has a filiment which is directly prortional to the absolute temperature? At 37 degrees celcius the reisitance of the fimament is 015ohms. What is the working temperature of the filament?
Homework Equations
None...
Homework Statement
Calculate the equivalent resistance of the network shown in the diagram. The resistances are: R1 = 12 ohm, R2 = 5 ohm, R3 = 15 ohm, and R4 = 15 ohm.
no prob here
Req = [(1/12)+(1/5)+(1/15)]^-1 + 15 = 17.86ohm
When a battery with E = 6 V and zero internal...
"Iron core energy change" and "transformers vs. ohms law"
Ooh yes, I do have two question. So enjoy the meal all physics lovers! :smile:
1. If the field is increased putting an iron core inside the circuit, then what about energy conservation? (I don't know much about H-fields.)
2...
A 3Ohm and a 1.5 ohm resistor are wired in paralles and the combination is wired in series to a 4 ohm resistor and a 10 V emf device. The potential difference on across the 3 ohm resistor is?
I reduced the 2 in parrallel to 1.875 ohms and then addes the 4 ohm, which gave me a total...