The magnetic flux through a coil of wire with two loops has a charge of 88 Wb in 0.42 seconds. What is the magnitude of the emf induced in the coil?

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Let Induced emf is `epsi` ,so we can define

`epsi=(N.Deltaphi)/(Delta t)`

where N = no. of turns =2

`Deltaphi= ` change in magnetic field =88Wb

`Deltat=` change in time = .42 Sec

So

`epsi=(2xx88)/(.42) V`

`=4.190` V

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