Friday
October 24, 2014

Homework Help: Physics repost

Posted by Mary on Wednesday, October 10, 2007 at 6:52pm.

Please help!! I have tried everything and is still coming up with and incorrect answer.

A piece of copper wire is formed into a single circular loop of radius 13 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.70 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3 10-2 /m. What is the average electrical energy dissipated in the resistance of the wire.



For Further Reading


Physic please help! - drwls, Tuesday, October 9, 2007 at 7:49pm
The change in B divided by the time (0.45 s), multiplied by the loop area in square meters, is the average voltage in the loop during the interval. The wire resistance is 2 pi R * 3.3 10-2 ohms(?)/m.

Coumpute the average current (Vav/R) and multiply it by the average voltage, Vav, computed by the method above.

Average Power =
[(delta B)(pi R^2)/(delta t)]^2/(2 pi R)
= (1/2) pi* R^3 [(delta B)/(delta t)]^2

Check my math and my logic. I could be wrong

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics repost - I know I have posted this question before but I have tried ...
Ap physics b - A piece of copper wire is formed into a single circular loop of ...
Physics - A piece of copper wire is formed into a single circular loop of radius...
Physic please help! - A piece of copper wire is formed into a single circular ...
physics - With a magnetic field perpendicular to a single 13.2 cm diameter ...
PHYSICS - A circular loop of flexible iron wire has an initial circumference of ...
physics #22 - A length of wire is bent into a closed loop and a magnet is ...
physics - A long, vertical, straight wire carries a current I going upwards. The...
chemistry stoichiometry - My chem teacher gave us this problem Twelve-gauge ...
Physics - A copper wire is 7.00 m long and has a cross-sectional area of 1.00 10...

Search
Members