Hello everyone, i'm confused on how to do this problem, it says:(adsbygoogle = window.adsbygoogle || []).push({});

An electric generator contains a coil of 120 turns of wire formed into a rectangular loop 40.0 cm by 20.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with B initially perpendicular to the coil's plane. What is the maximum value of the emf produced when the coil is spun at 1250 rev/min about an axis perpendicular to B?

? V

I tried the following:

Area = (40)(20) = .08m^2;

B = 3.50T <-- magnetic field

Intially

B Flux = BA = (3.50)(.08) = .28 Tm^2;

spun = 1250 rev/min = 20.83 rev/sec;

Emf = N* (change in B flux) / (change in time);

N is the number of turns;

So i tried: Emf = (120)*.28*20.83 = 699.888 which was wrong, any ideas? Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Hat is the maximum value of the emf produced when the coil is spun at 1250 rev/min,?

**Physics Forums | Science Articles, Homework Help, Discussion**