Recent content by wheybags

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    Potential difference between two points problem

    Oh god, I'm an idiot. I was using Ke = 9...
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    Oh, I thought it was from the point (in this case the origin) to the wire. Was my interpretation of a hat subscript y correct?
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    Forgot to say, if I were to fix that error, was my solution otherwise correct?
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    Well, ****, I knew my lecturer was bad, but I mean, really...
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    So my notes are wrong?
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    Is permeability the same as permittivity? Beacuse my notes say permittivity.
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    What is the Correct Approach for Calculating Magnetic Field Strength?

    Homework Statement Homework Equations The Attempt at a Solution I let µ be 9, as that's the approximate permittivity of air/ free space. I assumed that as a hat had a subscript y, it ran parallel to the y axis, and worked from there, getting the cross product of the unit...
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    Potential difference between two points problem

    I think I worked this out, would appreciate if someone could confirm my answer. 500pC = 500x10^-12 C Potential at a point = Kₑ (q/r) applied these and got: Va = 9x10^-12 Vb = 3x10^-10 Potential difference between a and b = |Va - Vb| => 2.91x10^-10
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    Impedance in an electric Circuit

    But can I still treat it like a DC circuit?
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    Impedance in an electric Circuit

    Does that mean I can just treat it exactly like I would a DC circuit?
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    Impedance in an electric Circuit

    Homework Statement Homework Equations V=IR ? The Attempt at a Solution My main problem with this question is that impedance seems to apply only when inductors and capacitors are involved, but this circuit includes only resistors, so it seems to me like I could just treat it as resistance...
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    Potential difference between two points problem

    r1 and r2 are distances from the origin, right? But what is V? also, is E the electric field, which is F/q? If so, I would need q, the charge at each point, wouldn't I? but you said I didn't.
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    Potential difference between two points problem

    I looked, but couldn't find anything really. Wouldn't I need to know the charge at a and b to do anything?
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    Potential difference between two points problem

    Homework Statement Given a point charge of 500pC at the origin, find the potential difference between points a and b at distances 5m and 15m respectively along the x-axis. Homework Equations Coulomb's law, I think? The Attempt at a Solution The reason I thought coulombs law was relevant...
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    Resultant Force on -2x10^-6 C Point Charge Near 3 & -4x10^-6 C

    I'm asking why the method I proposed is not a valid solution, and why the the one that AM posted is.