I'm having some trouble with these two problems.(adsbygoogle = window.adsbygoogle || []).push({});

1.

A 1.2-m-long aluminum rod is rotating about an axis that is perpendicular to one end. A 0.16-T magnetic field is directed parallel to the axis. The rod rotates through one-fourth of a circle in 0.65 s. What is the magnitude of the average emf generated between the ends of the rod during this time?

THis one i wasn't sure either but i tried using the -N times the flux/time..but i wasn't sure if that was the right equation either.

2.

A piece of copper wire is formed into a single circular loop of radius 14 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.56 T in a time of 0.66 s. The wire has a resistance per unit length of 3.4 x 10-2 /m. What is the average electrical energy dissipated in the resistance of the wire?

For this one I was trying to do emf=BAcostheta/t and then i used that value in the equation P=V^2/R however, i can't get the right answer.

**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: Electromagnetic Induction

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

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