Recent content by Hybird

I have an inductor of 500uH that is attached to a 1volt source and the other side is connected to a mosfet RDSon = 0.012 ohm. If I turn on the mosfet for 5us and let current start to flow through the inductor I can calculate the max current reached assuming the current ramps up linearly. Then...

Never mind, I'm retarded. I just expressed the second order derivative as : d/da(dX/da) and when you divide it by d/da(dT/da) the d/da part cancels because its just like an operator. I got an exponential result as X(T) = exp(T/sqrt(2))

Ok, maybe I should give the RHS of the equations too.. eqn1: \frac{d^{2}X}{da^{2}} = -X \frac{dT}{da}} \frac{dT}{da}} eqn2: \frac{d^{2}T}{da^{2}} = \frac{-2}{X^{2}} \frac{dX}{da}} \frac{dT}{da}}

Homework Statement This is more of a problem I have with my knowledge of differentials. I have two second order differential equations for variables X(a) and T(a). I want to get an expression for X(T). I know I have to divide them, but how do you go about dividing them if they are explicitly...

So maybe I am on the right track. Just curious, how do you get that limit? Do you have to binomial expand the square root?

This doesn't seem right because V(t) is unbounded as t goes to infinity and thus we would pass the speed of light correct?

Homework Statement Electron placed in static electric field \vec{E} = -\Psi\hat{x} , its initial velocity is 0. Calculate V(t). Homework Equations F_{e}=\frac{d}{dt}p(t) p(t) = \gamma(t)mv(t) Gamma is 1/sqrt(1-v^2/c^2) of course The Attempt at a Solution This is how I...

We all accept that the universe is expanding and that expansion is accelerating. So what exactly are the speeds of those far off galaxies with respect to an Earth observer. And if the universe is destined to continue this expansion forever, then won't the speeds of far off galaxies eventually...

...Assuming an n-type Si transistor Also I don't have any other information.. I know that the more and more you apply a negative voltage on the gate, the smaller the channel gets which leads to more resistance across the source-drain channel. The answer I am lookin for is 2mA.. that would...

I have a problem of calculating the current through a system. It is a simple JFET transistor with the source grounded. The gate is reverse biased with a 3v potential, and the drain has a 2000 ohm resistor in series then a positive 20v potential in series which is of course grounded. How would I...

They are also used as "shunt resistors" in amp meters. I believe that's the name anyways. And they are used in volt meters as well.

Lefthand thread is used on brake layths where the layth turns clockwise. This is so the machines rotation and vibrations do not interfere with the nut on the end. They are also used on some semi-uck wheel lugs, for the same reason. As well as inside transmissions on the "driven" gear shaft. I...

Could someone explain why putting a shopping bag over a debit car make it readable for the scanner? I've always wonder why this is, and I'm almost certain it has to do with physics.

Consider a Rheostat. This is an instument that allows you to vary resistance by a mechanical means. They are used on new Fuel injected vehicles. The are built into the throttle position sensors. The farther the throttle plate is moved the more resistance is created in the circuit. A current is...

Consider an AC source with series elements (resistor,inductor, capacitor). In order to determine information from the circuit it is useful to consider impedance. So here's the question, total impedance is a complex number, and that is because the impedance of the cap and inductor are imaginary...