Problem Set 6
Question1:
Note that in part (a), the one-time fee is a fixed cost for the firm.
Also note that in part (b.iii), the firm will produce q>0 in the short run despite making losses, for if it
produces q=0. Its profit is -200, which is worse for

Module 4 : Uniform Plane Wave
Lecture 31 : Power Flow in a Medium
Objectives
In this course you will learn the following
The Poynting theorem and the concept of Poynting vector.
Average Poynting vector( A true measure of power flow).
Conditions for averag

EM 3 Section 14: Electromagnetic Energy and the Poynting Vector
14. 1. Poyntings Theorem (Griths 8.1.2)
Recall that we saw that the total energy stored in electromagnetic elds is:
U = UM + UE =
1
2
allspace
1 2
B +
0
0E
2
dV
(1)
Let us now derive this mor

Problem Set 7
1) [35 marks] A monopolist sells a good in two markets. The demand curves in
the two markets are
q1 = 50 (p1/3) and q2 = 60 (p2/2)
where qi and pi are respectively the quantity and price in market i = 1,2. The
monopolists total cost function