Recent content by magnifik

oh i get it. k = sqrt(3^2 + 4^2) = 5 when i find E in phasor form from the given H, how do i know what direction it should be?

is there a reason you chose the denominator as 5?

The magnetic field expression for an electric field of a plane wave in air in the time domain is H(t) = y3sin(ωt + 3x + 4z). Find the frequency of the wave. i am having trouble where to begin on this problem. i know how to solve if there is only 1 direction variable (i.e. just x or just z)...

thank you! i thought the degree sign was a 0 this whole time -___-

I am trying to understand steady state tracking error. I was looking over one of the example problems in my textbook and this is what it said: G(s) = (-1)/(100(s^2-10.791)) D(s) = K(s+5)/(s+10) Td(s) = 1/s as it states above I don't understand how they got the value 3300... I got 2156 when...

i solve for Ie then do the KVL for the CE loop. then solve for Ic from that equation. then get Ib from the relationship Ib = Ie - Ie. if Ib and Ic are both positive then the saturation mode assumption is correct. thanks for pointing me in the right direction!

Vcc = Vbe,on + Vb --> Vb = 2.5 - 0.7 = 1.8 Vb/1000 + (Vb-Vc)/300 = 0 1.8/1000 + 1.8-Vc/300 = 0 --> Vc = 2.34 Ic = 1.8/1000 = 1.8 mA 2.5 = Vec + 300Ic + 1000Ic --> Vec = .16 since Vec = 0.2 in this problem and Vec is less than this, the transistor is not in active mode so i...

what confuses me about this is the position of Vc. normally, it is the voltage across the bottom resistor, but since there are two resistors with a node in between, is Vc the voltage across the 300-ohm resistor? or does Ic occur in both the 300-ohm and 1k-ohm resistor

i'm unsure. is it the voltage at that node between the two resistors?

VBE = VBE,on = 0.7 V (as defined in the text)

I am trying to determine the mode of operation for the following circuit and find the voltages and currents: I am given that β = 50 I know that VEC > VEC,sat for a transistor in active mode I applied KVL on the right loop and got: VCC = 300Ic + 1000Ic + VEC VEC = VCC - 1300Ic i'm...

i just want to make sure I'm doing this correctly as there is some discrepancy in my textbook. i know the centroid is equal to (Ʃpoles - Ʃzeros) / (# of poles - # of zeros) the equation i have is s2 + 2s + 8 / s(s2 + 2s + 10) so the zeros are -1 + i√7 and -1 - i√7 and the poles are 0, -1...

I am having trouble trying to obtain Y/R from the block diagram below: the only thing i understand so far is that the bottom right loop is a feedback loop and can be simplified to 1/(s+a1). i know b1s can be obtained from the right loop, but i am having trouble getting to that point. i know it...

I am trying to simply G1 = G1(1+F1) / (1 + G1F2(1+F1)) in terms of G1, G2, H2, and H3 where F1 = G2/(1-G2H2) and F2 = G3 / (1-G3H3) i got the result (G1(1-G2H2)(1-G3H3) + G1G2(1-G3H3)) / ((1-G2H2)(1-G3H3) + G1G3(1-G2H2) + G1G2G3) however, the book gives the result with a +1 in the...

Woops, misread your question. I thought you meant it was already on for 30 minutes and then off for the next 30 minutes so the power was like a pulse train. I thought for energy It's a graph that keeps increasing (never dropping) because it is a plot summing total heat energy since time t=0.