# Search results

1. ### Current Driven by EM wave

This is a theoretical question not a homework question, so if this is the wrong section to post this in please let me know. But my friend has this idea that if he sent an electromagnetic wave at a certain frequency at a surface it could create a current and this in turn could charge a battery...
2. ### Understanding an FM transmitter circuit

This is a colpitts oscillator, with L2 and C5 comprising the tank circuit. C6 is the feedback capacitor which produces the modulated signal. C8 is a decoupling capacitor attempting to maintain the voltage across the circuit. C3 and R5 make up a low pass filter, passing frequencies equal to that...
3. ### Understanding an FM transmitter circuit

What I've gathered so far is that L2 and C5 are acting as an oscillator to modulate the frequency at a steady sine wave. C6 appears to me to be just a capacitor to keep it oscillating. Does this all sound correct so far?
4. ### Understanding an FM transmitter circuit

Homework Statement . I am just trying to understand this cicuit a little better. Especially the right half, I know that the left half is just acting as an amplifier but I'm not sure how the right half works. Also how is the frequency being modulated here? The attempt at a solution. I...
5. ### How do I find two vectors that are orthogonal to each other?

Thank you very much LCKurtz! It worked!
6. ### How do I find two vectors that are orthogonal to each other?

LCKurtz What does v1 have to do with the question? Do you know how to find the vector projection of v2 on v3? If so, you can just subtract it from v2 to get the orthogonal projection vector. I suppose v1 doesn't have anything to do with the question. Is the vector projection of v2 onto v3...
7. ### How do I find two vectors that are orthogonal to each other?

1. Find a nonzero vector v in span {v2,v3} such that v is orthogonal to v3. Express v as a linear combination of v2 and v3 2. v1= [3 5 11] v2= [5 9 20] v3= [11 20 49] 3. I know that the dot product of v and v3 must equal zero. And that v must have components between 5 and 11, 9 and...
8. ### Least Squares Fitting

I simplified the expression for B into... [Sum(x)Sum(y)] * [(N - 1)] / [Sum(x^2)] [N - Sum(x^2)] This almost gives me what I want but I'm not sure what to do with the N - 1 and N - Sum(x^2). Might it be that when N = 0 (at the origin) it reduces the expression to just the best estimate...
9. ### Least Squares Fitting

1. Homework Statement Suppose two variables x and y are known to satisfy a relation y=Bx. That is a graph of x vs. y is a line through the origin. Suppose further that you have N measurements (xi,yi)and that the uncertainties in x are negligible and those in y are equal. Prove the best...