Question

A generator almost always contains a coil of wire inside a magnetic field. The coil shown below has N turns and a radius of R. It is rotating in a magnetic field of strength B at an angular frequency o. This means that the angle between the area vector of the coil and the magnetic field is = wt. х a. What is the induced emf in the coil as a function of time? b. If the left side of the coil is initially coming out of the page, what is the direction of the induced current? c. Let's put some numbers to this: Let B = 0.20 T, A = 0.25 m², and f= 60 Hz (remember, w = 271f). How many turns of wire are needed in the coil to produce a peak voltage of 170 V?

Answer 1

0 B. BACOSO Magnetic flux? oscof d = BA coswr sol do. -BA sinut xw do -do to Basinwr - Emf induced ar 2 If (lenz's lewo left part is coming out it means fles which inside the loop is decreesing so clockwise will flow in order to oppose this change in the flux. es aurrew E= 170 Z 60x211 x 0-2 x0.25 (72xN - g turns. 67 N = 1 to