Recent content by johndoe

Concept check: A Right hand circular polarized wave is having the E vector circulates in the direction of the fingers with the thumb in the direction of wave propagation with its components Ey leading Ex by 90 degrees?

What is the difference of a magnetic and nonmagnetic medium? And how does it affect wave propagation on these mediums?

A small source of light at the bottom face of a rectangular glass slab 2.25 cm thick is viewed from above. Rays of light totally internally reflected at the top of the surface outline a circle of 7.6cm in diameter in the bottom surface. Determine the refraction index of the glass. This is...

The stack effect on Vt for a two input NAND gate. (2 nmos in series for pull down) If I am understanding correctly, the Vt for the nmos on top would increase only during transitions where the bot nmos is on? cause if the bot nmos is off, the top nmos would also be grounded and stack effect would...

Ok with two nmos in series, assuming their body is both grounded, Vt of the top nmos would increase since when a gate voltage is applied to the bot nmos, the source voltage (Vs) of the top nmos will be at a voltage Vgs higher than its body. But here comes the question, such a 'stack effect'...

What is stack effect in cmos design and how would it affect the threshold voltages?

I am concerned out of state for both.

Ok I have been accepted by university of michigan (ann arbor) as well as george tech(atlanta) for EE. Any advise to choose one from the other is welcome. Thanks.

A metal alloy consists of magnesium and aluminum.When a 1.00g sample of the alloy is reacted with excess HCl, 0.0989g of hydrogen gas forms. Calculate the percent composition of the alloy. Ok I got the following balanced equations : Mg + 2HCl -> MgCl2 + H2 2Al + 6Hcl -> 2AlCl3 + 3H2...

This is what I did : I hook up a 1V source and solve for I1 and thus the Rth. And I left out a - sign in my final answer Vc(t) = 10e^-t/RC

Question: Finding the function of the 0.1uF cap Vc(t) when the switch is closed at t=0 given that the cap is initial charged up to 10V. ok my attempt at this I find the thevenin eq of the right hand side circuit and come up with : Vc(infinite) = 0, Vc(0)=10 , time constant = RC =...

ops the switch should be opened initially and then closed(drawing error)

This is one of the questions I got in my finals, and I couldn't do it back then. I want to find Vc(t) , given the cap is initially charged up to 10V, the switch is then opened. My approach is to find the thevein eq of the circuit, which I would came up with a resistor in parallel with the cap...

o so the Rth is 4//2 +2= 3.33 and since there is no current in the far right resistor, the current divider just involves the other 3 ?

Finding the thevenin equivalent of the above circuit This is what I did, I set the current source to zero, no current passes through so the Rth is the resistor on farthest right // with another 2 in series with 4. so it is 5ohms? Finding the open circuit voltage, I use a current...