with constant velocity What are the magnitude and direction of the total magneti

Question

with constant velocity

What are the magnitude and direction of the total magnetic force on the coil as it enters the magnetic field, as it moves within the field, and as it leaves the field?(Use any variable or symbol stated above along with the following as necessary: B for the magnitude of

and v for

28. + -/6 points SerCP10 20.P.055 My Notes Ask Your Teacher A rectangular coil with resistance R has N turns, each of length and width w as shown in the figure below. The coil moves into a uniform magnetic field Bin with constant velocity v. What are the magniude and direction of the total magnetic force on the coil as it enters the magnetic field, as it moves within the field, and as it leaves the field?(Use any variable or symbol stated above along with the following as necessary: B for the magnitude of and v for v.) in | physPa Operation (a) as it enters the magnetic field Relations | |Lo| | | Sets -Direction (b) as it moves within the field -Direction Vectors 10og Greek (c) as it leaves the field Helo -Direction Need Help? ReadIt

Explanation / Answer

a)

As the loop enters the magnetic field

induced emf is given as

E = N BwV

induced current in the loop

i = E/R = N BwV /R

magnetic force on the loop is given as

F = i B L = (N BwV /R) B L

F = N B2wVL /R

direction :: Left

b)

within the field ,

since change in flux is 0 , induced emf and current are 0 and hence no magnetic force

c)

as it leaves the loop :

F = N B2wVL /R

direction :: left

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