The magnetic flux (phi) in a closed circ...

The magnetic flux `(phi)` in a closed circuit of resistance `20 Omega` varies with time (t) according to the equation `phi = 7t^(2) - 4t` where `phi` is in weber and t is in seconds. The magnitude of the induced current at t =0.25s is

25mA

`0.025 mA`

47 mA

175 mA

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NCERT FINGERTIPS-PRACTICE PAPPER-Practice Paper 3

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