UTF-8 U+6211 U+662F wrote:Reposting my question from General Chat
Copper has one valence electron, with a density of 8.94 grams per cubic centimeter and an atomic weight of approximately 64 grams per mole. Suppose a copper wire has a current density of 18.8 amperes per square millimeter. Find the drift velocity inside the wire.
mdv2o5 wrote:Determine the output voltage as a function of the source voltage, R1, and R2.
A note on studying for op amps and also a bit of a hint:
Ideally, inverting and non-inverting op amp configurations should be memorized/included on your notes, but it's always good to be able to derive these formulas using basic circuit laws and the ideal op amp assumptions since it's really easy to create an op amp circuit that does not fall neatly into a standard configuration.
UTF-8 U+6211 U+662F wrote:mdv2o5 wrote:Determine the output voltage as a function of the source voltage, R1, and R2.
A note on studying for op amps and also a bit of a hint:
Ideally, inverting and non-inverting op amp configurations should be memorized/included on your notes, but it's always good to be able to derive these formulas using basic circuit laws and the ideal op amp assumptions since it's really easy to create an op amp circuit that does not fall neatly into a standard configuration.
- Interesting introduction problem to op-amps for me!
mdv2o5 wrote:Close! Check the KCL expression again (and remember that I = V/R)
UTF-8 U+6211 U+662F wrote:mdv2o5 wrote:Close! Check the KCL expression again (and remember that I = V/R)
Whoops. I always mess up Ohm's law for some reason (I should really make sure to double check).
- Take two
mdv2o5 wrote:
- A neat little trick...
Your turn!
UTF-8 U+6211 U+662F wrote:All right, thanks!
Onto basic circuit safety:
Touching two nodes of a DC voltage of above approximately what voltage can be lethal? What kind of factors affect whether a shock might be lethal? What current range is usually lethal? What are some harmful effects of having a current flow through you that is below the lethal limit (i.e. not enough to get you killed)?
Jacobi wrote:UTF-8 U+6211 U+662F wrote:All right, thanks!
Onto basic circuit safety:
Touching two nodes of a DC voltage of above approximately what voltage can be lethal? What kind of factors affect whether a shock might be lethal? What current range is usually lethal? What are some harmful effects of having a current flow through you that is below the lethal limit (i.e. not enough to get you killed)?
- Answer
Jacobi wrote:Write the voltage drop equations for a capacitor and a resistor.
UTF-8 U+6211 U+662F wrote:Jacobi wrote:Write the voltage drop equations for a capacitor and a resistor.
- Answer
UTF-8 U+6211 U+662F wrote:Jacobi wrote:Write the voltage drop equations for a capacitor and a resistor.
- Answer
Jacobi wrote:UTF-8 U+6211 U+662F wrote:Jacobi wrote:Write the voltage drop equations for a capacitor and a resistor.
- Answer
Awesome! You next.
UTF-8 U+6211 U+662F wrote:All right!
Describe the behavior of an RC circuit which is a) charging and b) discharging.
Return to “Question Marathons”
Users browsing this forum: No registered users and 2 guests