3) A 39 turn circular coil of radius5.00 cm and resistance 1.00 isplaced in a ma

Question

3) A 39 turn circular coil of radius5.00 cm and resistance 1.00 isplaced in a magnetic field directed perpendicular to the plane ofthe coil. The magnitude of the magnetic field varies in timeaccording to the expression B = 0.0190t + 0.0410t2, where t is inseconds and B is in tesla. Calculate the induced emf inthe coil at t = 4.20 s.
mV

3) A 39 turn circular coil of radius5.00 cm and resistance 1.00 isplaced in a magnetic field directed perpendicular to the plane ofthe coil. The magnitude of the magnetic field varies in timeaccording to the expression B = 0.0190t + 0.0410t2, where t is inseconds and B is in tesla. Calculate the induced emf inthe coil at t = 4.20 s.
mV

Explanation / Answer

we have B/t=0.019+0.082*t the induced emf in the coil at t = 4.20 s. emf=39**0.052*B/t(t=4.2s)=0.111 V=111 mV

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