Will Rate LifeSaver ASAP! Thank you! Question 1: The earth\'s magnetic field, li

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Question 1:

The earth's magnetic field, like any magnetic field, stores energy. The maximum strength of the earth's field is about 7.0 x 10-5 T. Find the maximum magnetic energy stored in the space above a city if the space occupies an area of 7.1 x 107 m2 and has a height of 2100 m.

Question 2:

The current through a 3.82-mH inductor varies with time according to the graph shown in the drawing. What is the average induced emf during the time intervals (a) 0-2.0 ms, (b) 2.0-5.0 ms, and (c) 5.0-9.0 ms?

The earth's magnetic field, like any magnetic field, stores energy. The maximum strength of the earth's field is about 7.0 x 10-5 T. Find the maximum magnetic energy stored in the space above a city if the space occupies an area of 7.1 x 107 m2 and has a height of 2100 m. The current through a 3.82-mH inductor varies with time according to the graph shown in the drawing. What is the average induced emf during the time intervals (a) 0-2.0 ms, (b) 2.0-5.0 ms, and (c) 5.0-9.0 ms?

Explanation / Answer

1)
energy density, u = B^2/(2*mue)

energy in the given volume, U = V * B^2/2*mue

U = 1.179*10^14 J


2)

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