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Physics 2524
Chapter 34
16
Physics
Undergraduate 2
12/10/2010

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Term
The Power Provided to the circuit by pulling on the wire
Definition
Pinput=Fpullv=(v2l2B2)/R
Term
Force required to pull the wire with a constant speed v
Definition
Fpull=(vl2B2)/R
Term
Power dissipated by a circuit
Definition
Pdissipated=I2R=(v2l2B2)/R
Term
Ohm's Law
Definition
I=(vlB)/R
Term
Motional emf perpendicular to a magnetic field
Definition
ξ=vlB
Term
Magnetic Flux
Definition
Φm=ABcosΘ
Term
Total magnetic flux through a loop
Definition

Φm= ∫ B · dA

area of loop

Term
Infinitesimal Flux through a small area
Definition
m = {(µ0Ib)/(2Πx)}dx
Term
Induced emf
Definition
Iinduced=ξ/R = (vlB)/R
Term
Faraday's Law
Definition

ξ = | dΦm/dt | = vlB

 

ξ = -(dΦm/dt)

Term
Lenz's Law
Definition
There is an induced current in a closed, conducting loop if and only if the magnetic flux though the loop is changed.
Term
Work done by the induced electric field as charge q moves around a closed curve
Definition

Wclosed curve=q ∫E · ds = Πr2 |(dB)/(dt)|

                             ↑

                           closed

Term
Induction of a solenoid
Definition

Lsolenoidm/I=(μ0N2A)/l

N=l/d

L=length need to give inductance

Term
When does potential decrease?
Definition
Potential decreases in the direction of increasing current
Term
Total energy stored in an inductor
Definition

UL=1LI2= (1)   Al (μ0NI)2    

     2      (2μ0)         (l)

 

Term
Faraday's Law
Definition
There is a current in a coil of wire if and only if the magnetic field through the coil is changing.
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