Recent content by smoics

Yes--merci beaucoup!

So it takes the path of least resistance, which is NOT through the 10 ohm resistor?

So I'm going to have multiple equations and multiple unknowns? Yuk. They gave us one like that in lab and the TA couldn't figure it out... Luckily, I think the homework should be easier. Thanks.

Why wouldn't you add the 6+10=16? Because they're in series and the rest are in parallel...Yet when I add them all up as if they are in parallel, plus the "Extra" 5, I get the correct answer...

resistors and currents--circuits Homework Statement What is the current through the 10 ohm resistor in the figure ? Homework Equations V=IR The Attempt at a Solution Am I supposed to use Kirchhoff's loop law? I think I have too much info. to use that. But I think the current...

circuits--equivalent resistance Homework Statement What is the equivalent resistance between points a and b in the figure ? Homework Equations Resistors in series add up, resistors in parallel are 1/(1/R + 1/R...) The Attempt at a Solution I tried 1/(1/16 + 1/12 + 1/4) + 5, but I...

Oh...use the total R and voltage to solve for current and then use the equation I had posted above. Got it, thanks!

Or would the one resistor be in series since it's along a different line (horizontal vs. vertical)? That isn't how they draw the examples of series vs. parallel, but I'm thinking there's one of each in this circuit.

Oops--yes, they are in parallel. I tried using the battery voltage (15 V), but it says that answer is incorrect.

curent and ohm's law--potential difference Homework Statement What is the potential difference across the 10 ohm resistor in the figure ? What is the potential difference across the 20 ohm resistor in the figure? The two resistors are in parallel and there is a battery that is 15 V...

Maybe I use sigma and rho?

(solving for diameter of filament, in micrometers)

current and Ohm's Law--filament diameter Homework Statement A standard 100 W (120 V ) lightbulb contains a 8.50 cm -long tungsten filament. The high-temperature resistivity of tungsten is 9.0*10^-7. Homework Equations Power=I\DeltaV=\Delta^2/R J=I/A The Attempt at a Solution I...

Q1 = C1V and Q2 = C2V total charge: Q = Q1 + Q2 = C1V + C2V = ( C1 + C2 )V Ceq = Q/V = C1 + C2 I know C1 and C2, but if I use Q1/C1 = Q2/C2, I have two unknowns, both Q's. Don't I? Or can I solve for them using one of the above equations? I know Qnet, does that help??

electric potential and fields--capacitors Homework Statement What is the potential difference across each capacitor in the figure? What is the potential difference across each capacitor in the figure? Homework Equations Q=C/V Parallel capacitors: add up series capacitors: (1/c +...