Recent content by GermanMC

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    Calculating Magnetic Field of a Solenoid with Changing Amperage

    Homework Statement I've been given a solenoid and I have N/l = 100 turns/meter, dI/dt = 0.05A/s and a radius of 0.005m. I am only concerned with the dI/dt. Homework Equations B = μ*N/l*I \Phi = \int\int B\bulletn dl \epsilon = d\Phi/dt The Attempt at a Solution For B I get the...
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    Capacitance of a System (Spherical Conducting Shells)

    Bingo. Free charge didn't matter.
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    Capacitance of a System (Spherical Conducting Shells)

    Nvm, I feel that I have the kinks worked out.
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    Magnitude and Direction of a Magnetic Field at the Circumference of a Disk

    Homework Statement A very thin disk of non-conducting material initially holds a charge QO = +5 μC that decreases with time t as Q(t) = QO e-t/τ where τ = 10 seconds. If the disk has a radius of 0.10 m, what is the magnitude and direction of the magnetic field at the circumference of...
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    Capacitance of a System (Spherical Conducting Shells)

    Homework Statement A spherical conducting shell of radius 0.1 m has a free charge of -2 μC. It is surrounded by a concentric spherical conducting shell of radius 0.12 m carrying a free charge of -2 μC. Between the shells is a dielectric material of dielectric constant 10 εo. If the dielectric...