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A coil of resistance R having n turns is...

A coil of resistance R having n turns is connected with a galvanometer of resistance 4R. If the magnetic flux changes from `phi_(1)` to `phi_(2)` in time t in the circuit, what will be the value of induced current?

Text Solution

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Effective resistance `=R+4R=5R`
For n turns the effective change in the magnetic flux `=n(phi_(2)-phi_(1))`
So, the emf induced = `-(n(phi_(2)-phi_(1)))/(t)`
`therefore` Induced current = `-(n(phi_(2)-phi_(1)))/(5Rt)`
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