The magnetic flux linked with a coil at any instant ' t ' is given by φ = 5 t 3 − 100 t + 300 , the e.m.f. induced in the coil at t = 2 second is

Question

The magnetic flux linked with a coil at any instant ' t ' is given by φ = 5 t 3 − 100 t + 300 , the e.m.f. induced in the coil at t = 2 second is, − 40 V, 40 V, 140 V, 300 V

MARKS App · Accepted Answer

e = − d t d ϕ ​ = − d t d ​ ( 5 t 3 − 100 t + 300 ) = − ( 15 t 2 − 100 ) at t = 2 sec ; e = 40 V

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