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# For the configuration in Ex. 10.1, consider a rectangular ISBN: 9780321856562 45

## Solution for problem 2P Chapter 10

Introduction to Electrodynamics | 4th Edition

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Problem 2P

Problem 2P

For the configuration in Ex. 10.1, consider a rectangular box of length l, width w, and height h, situated a distance d above the yz plane (Fig. 10.2). (a) Find the energy in the box at time t1 = d/c, and at t2 = (d + h)/c.

(b) Find the Poynting vector, and determine the energy per unit time flowing into the box during the interval t1 < t < t2.

(c) Integrate the result in (b) from t1 to t2, and confirm that the increase in energy (part (a)) equals the net influx.

Step-by-Step Solution:

Solution

Step 1

In this problem, we have energy in the box at time , the Poynting vector and integrate the result.

Step 2 of 4

Step 3 of 4

##### ISBN: 9780321856562

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For the configuration in Ex. 10.1, consider a rectangular