- #1
arl146
- 343
- 1
Homework Statement
A 40 turn square coil has an area 11.0 cm2 and is rotated with an angular speed of 110.0 rads in a uniform 1.00 T magnetic field. The axis of the coil is perpendicular to the field at all times.
(i.) What is the frequency of the sinusoidal voltage induced across its ends?
(ii.) What is the peak voltage induced across the ends of the coil?
(iii.) What is the flux through the coil when the plane of the coil is inclined at 43.0° to the magnetic field?
(iv.) What is the average power dissipated in the resistor?
Homework Equations
The Attempt at a Solution
I got (i.) which was 17.5; There was also another question relating to "If the coil forms a closed circuit with a series resistance of 50.0 , what is the instantaneous power being dissipated in the resistor when the plane of the coil makes an angle of 43.0° with the magnetic field? " He gave the answer which was 0.469 W. I am not sure if that's useful for anything. A student gave an equation for part 2 -> Flux=BAcos(wt) which then you take the derivate and then either take the derivate again or say that the max of cos or sin is always 1 and use that. But I don't know how to take the derivate of that formula and then what to do next? Help please!