Question

Derive an expression for induced emf and induced current when a conductor of length l and velocity v is moved in mag field

Answer 1

e=d∅/dt

magnetic flux (∅)=B*effective area

∅=B*l*x

where l=length of moving arm

x=varying length of other arm due to movement of l

e=Blx/dt

x/dt (distance/time=speed)

e=Blv

where e is induced emf

induced current = Blv/R (using general ohms law formula V=IR)

where R is resistance

hope this helps