1. The problem statement, all variables and given/known data A flat square coil of N turrns and area A is rotated at an angular velocity w in a uniform magnetic field of strength B. The rotation axis is perpendicular to the magnetic field direction. The coil is connected to a Galvonometer using suitable slip ring connectors and the total resistance in the coil and meter is R. Show that the detected current is I = -NBAcos(wt) / R 2. Relevant equations Fardays 's law of induction *N I = V/R 3. The attempt at a solution I get I = NBAwsin(wt) / R I dont see why i am wrong. The B field and area is uniform. So I only differentiate cos(wt) and divide the emf by R to obtain the current. Any help or suggestions would be very welcome.