Recent content by timeforplanb

I'm not that familiar with the internal circuitry of TTL gates yet. In the diagram, Vcc is one of the inputs right? Where is the other one? Do A and B represent the output terminals? So, if the input is grounded we know that it goes through a certain circuit so we expect its output voltage to...

Why do TTL integrated circuits assume unconnected inputs to be at logic level HIGH? Does the answer lie in the circuitry itself or some other factor?

The thing is, our professor didn't give us an illustration or anything. One of my classmates just drew the set-up - two plates separated by d and that's it. Sir, can I post another question here and my solution to it? It's about electromagnetics too.

So I saw my classmate's answer for this problem and for (b), d in C=εoS/d is d=(d1+d2)/2? Why is this so?

Electromagnetics -- parallel plate capacitor energy storage Homework Statement A parallel-plate capacitor 0.5m by 1.0m has a separation distance of 2cm and a voltage difference of 10V. Find the stored energy, assuming that ε=εo. If a 200-volt potential is applied in the capacitor, (a)...

ah. thanks for pointing those out, sir. so it means that the major mistake is the 2A that's supposed to be 0.5A? nothing more?

Homework Statement Determine the value of RL that will draw the maximum power from the rest of the circuit shown below. Calculate the maximum power. (This problem was included in our exam this week, and I don't really recall the exact values of the parameters, but I'm pretty sure that the...

thank you very much for the verification sir!

Homework Statement Find Vx using source transformation Homework Equations V=IR KVL The Attempt at a Solution After doing source transformation on the three pairs of current sources and resistors... KVL: -6+2I-Vx+4I-3+3I+5I-2=0 14I-Vx-11=0 but Vx=5I (is it? I'm not so sure about this)...

f-focal length s-object distance s'-image distance M-magnification a. To form a real image twice as big as the object, we let the magnification be M=-2 (check out the sign convention at the bottom in case you don't know yet) But, M=-(s'/s), and since we're solving for s, we manipulate the...

looks okay to me.

Homework Statement Using the method of sections, determine the force in members BD, CD, and CE of the roof truss shown in the figure (the red line is the cutting plane and the green arrows are my assumed directions of the unknown forces) Homework Equations summation of moments=0...

thank you flyerpower! gneill - i'll keep that in mind. thanks, too :D

i wasn't sure, that was all. anyways, how would i compute for the v then? and for i and i1? can you please give me the equations? thank you.

Homework Statement Find the equivalent resistance seen by the source and use the result to find i, i1, and v. Homework Equations V=IR for series circuits: RT=R1+R2+...+Rn VT=V1+V2+...+Vn for parallel circuits: IT=I1+I2+...+In 1/RT=(1/R1+1/R2+...+1/Rn) The Attempt at a Solution since 30Ω and...