(adsbygoogle = window.adsbygoogle || []).push({}); 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 velocitywin 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.

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# Homework Help: Rotating coil

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