SP212‐Spring‐2016 CH‐30‐A Assignment First do the following Wiley‐Plus assignment: Assignment #30a After completing the Wiley‐Plus, in your homework notebook, complete the following problems: CH30 Questions # 1, 3, and 4 CH30 Problems # 2, 21, and 35. To check your work, the answers to the odd problems are in the back of the book. The answers to the even problems are:. #2)   0.452V Homework Then complete the attached worksheets: (Note: the above problems were designed to ensure you have the skills to solve the worksheet problems. It is imperative to your learning of the problem solving technique to do the above problems BEFORE attempting the worksheet problems. You are graded on both! Homework notebooks are graded.) CH‐30‐A‐1: For each of the equations below, 1) State what each term is in your own words … 2) What the units of each term are… 3) What is the general use of that equation in your own words?  
A.  B   B  dA B.    N
dB
dt
C. Derive   BLv fromFaraday’sLawforthefollowingscenario.
Explainwhateverytermisincludingunits.Whichdimensionofthe
loopisLinthatequation,andwhy?
Aone‐turnrectangularloopofwirewiththedimensionsshownislocatedsothatpartis
insidearegionofuniformmagneticfieldB directedintothepage,andpartisoutsidethe
field.Theloopmovestotherightataconstantspeedv.
D. ∮
∙
E. 1)ExplaininyourownwordsLenz’slaw.
2)Ifthemagneticfieldisdecreasinginthebelowdiagram,explain
howyouwoulduseLenz’slawtoexplainthedirectionofcurrent
flowinthroughtheresistor.
CH‐30‐A‐2: A rectangular loop of wire has area A. It is placed perpendicular to a uniform magnetic field B and then spun around one of its sides at frequency f. Starting with Faraday’s Law, write a simplified expression for the maximum (amplitude) of the induced emf (E) using the given variables and constants: Show all work CH‐30‐A‐3: In the figure below, a long rectangular conducting loop, of width L  0.10m , and resistance R  .40 , and of mass m  18 g is hung in a horizontal, uniform magnetic field 
B that is directed into the page and that exists only above line aa. The loop is then m
dropped; during its fall, it accelerates until it reaches a certain terminal speed vt  5 . s

Ignoring any air drag, determine the strength of the magnetic field B . Show all work CH‐30‐A‐4: The following situations are separate. In the scenario on the left, there is a long wire where the current is to the left and decreasing. Below the wire is a circuit oriented as shown. In the scenario on the right, a magnet is moving toward a circuit as shown. The row in the following table that correctly gives the direction (or status) of the current in resistor 1 and the current in resistor 2 is: Why?