Recent content by rail2k

But in the real world when current runs through a closed circuit doesn't the magnetic field constantly change due to a never steady current, just by extremely small amounts? And in a perfect circuit, if the circuit is initially open but then you close it won't the magnetic field increase as...

According to Faraday's Law a changing magnetic field induces an electric field, an example of this is if you have a wire close enough to another wire with current flowing through it the first wire will also have current run through it because of the induced electric field by the second wire...

Thanks a lot! Can't believe the answer was so close, lol.

Ah, so when t = τ, I = 5/500(1-e-1) ≈ 6.32 mA. So τ = 2 μs from the data and therefore L = 500*0.000002 = 1 mH. That seems correct, right?

Homework Statement A 5.0V battery is attached to an RL circuit. The current is given by the formula: I = V0/R(1-e-t/τ), where I0 is the steady-state current, and τ is the time constant for the circuit. Using the data table provided, determine τ, R, and L for this circuit. I(mA) | t(μs)...