The maximum current I max carried by the electro- magnet.

Question

While cruising down University Boulevard you are stopped by a cop who states that you ran a red traffic light. Because you don't want to pay the stiff fine, you are attempting a physics defense. You claim that due to the relativistic Doppler effect, the red color of the light λ=616 nm appeared green '=531 nm to you. The cop makes a quick calculation of his own and rejects your defense. How fast, in terms of your speed u divided by the speed of light in vacuum c, would you have to drive to justify your claim? Note that the speed u is taken to be a positive quantity. U 4.0 C

Answer 1

Question

Chapter 20, Problem 43P

(a)

To determine

The maximum current Imax carried by the electro- magnet.

(b)

To determine

The time constant τ

(c)

To determine

The time it takes the current to reach 95.0% of its maximum value.

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