Recent content by iharuyuki

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    Repeating measurement of observables?

    Thank you. Let me try again. 1. Once Bob's conducts his experiment, upon measurement, the system will collapse into one of its eigenstates which each have a probability of occurring. Since there is a certain probability of each state occurring, and each measurement could possibly result in a...
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    Repeating measurement of observables?

    I have a question on my homework set and I'm not sure the principle behind it: 1. Alice measured an observable F (a matrix) and passed the measured system immediately to another experimentalist, Bob, who is going to measure another observable G. Alice claims that she can deduce the experiment...
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    Superposition: Find V(t) in complex (AC) circuit

    I see, thank you!
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    Superposition: Find V(t) in complex (AC) circuit

    Thank you very much for your response. With the capacitor's impedance set to negative and the correct answer pops up. What is the rule to determine whether an impedance is positive or negative?
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    Superposition: Find V(t) in complex (AC) circuit

    Homework Statement Homework Equations phasor forms voltage division current division The Attempt at a Solution Using superposition, considering only the varying voltage source. Z (L) = 4j Z (C) = 5j Total impedance: 4 is parallel with 5 = 2.44 + 1.95j series with 1 + 4j Total...
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    First order RC: Find Unknown DC Circuit, given current graph

    Homework Statement Homework Equations [/B] Tao = R(th) C The Attempt at a Solution The unknown DC circuit model consists of a V(th) and R(th) Tao = (R(th) + 3000) C , total resistance of circuit is R(th) + 3000 0.004 = (R(th) + 3000) (1x10^-6) R(th) = 1 kOhm The V(th) should oppose the...
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    Maximum power of circuit with dependent voltage source

    All is good, thanks!
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    Maximum power of circuit with dependent voltage source

    Homework Statement Homework Equations V(oc) = I(sc) * R(th) Kirchoff's voltage law The Attempt at a Solution a) is okay. For part b): After redrawing with the R(th) and V(th) found in part a): Equations of loops: s is I(sc) a is I(left loop) left loop: -8 + a(4000) + (a-s)(4000) = 0 right...
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    Find current using KVL (with dependent source)

    got it! That was the error. The proper equations were this: a(6000) + (a-b)(2000) + 5x - 10=0 -5x + (b-a)(2000) + b(3000) + (b-c)(4000) = 0 10 + (c-b)(4000) + c(2000) = 0 x/1000 = -c Thank you very much!
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    Find current using KVL (with dependent source)

    Homework Statement Homework Equations V = IR Kirchoff's Voltage Law The Attempt at a Solution [/B] Top loop - a Bottom right - b Bottom left - c Ix = x KVL: top: a(6000) + (a-b)(2000) + 5x - 10=0 bottom right: -5x + (b-a)(2000) + b(3000) + (b-c)(4000) = 0 bottom left ...
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    Induced current from changing magnetic field

    Got it! Thank you very much.
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    Induced current from changing magnetic field

    Homework Statement Homework Equations emf = i (induced) R emf = - d(Ф)/dt Ф = B (dot) A B = μi/(4piR) The Attempt at a Solution emf = - d(Ф)/dt emf = - d( B (dot) A )/dt emf = - d[ (μi/(4piR) * A ]/dt, A and B are perpendicular Really not sure how to proceed from here as there are...
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    Calculate resistance from resitivity

    I see, thank you very much.
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    Direction of induced EMF in loop

    Oh I understand that it decreases actually. I had only punched sin (2pi(0.28)) into a calculator and it gave me a positive. Thank you.
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    Calculate resistance from resitivity

    Homework Statement Homework Equations R = pL/A The Attempt at a Solution R(a) = 2x10^-4(0.15)/[pi(0.0005/2)^2] = 152.789 [Ohms] It is slightly off. Is there a subtle point that I've missed? Thank you very much.