A rectangular coil with resistance R has N turns, each of length and width w as

Question

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 in with constant velocity . What are the magnitude and direction of the total magnetic force on the coil during the following intervals? (Use any variable or symbol stated above along with the following as necessary: B for the magnitude of in and v for .)

a) as it enters the magnetic field F = direction =

(b) as it moves within the field F = direction =

(c) as it leaves the field F = direction =

Explanation / Answer

no emf and hence no force when inside the field because magnetic flux remain unchanged force generated will always oppose the change in flux and hence motion

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