Homework Help: Physics

Posted by charlie on Saturday, June 20, 2009 at 8:01am.

Would someone check this please?

A circular loop of wire of radius 0.10 m and of resistance 2.0 x 10^−3 ohms is in a region where there is a uniform magnetic field B.

The field is at 30deg to the normal to the plane of the wire loop as shown in Figure 3. The magnitude of the
magnetic field falls at a steady rate from 6.0 x 10^−2 T to zero in 2.0 seconds.
What is the value of the current flowing round the wire loop while the field is decreasing?

I get 0.8A

Physics - drwls, Saturday, June 20, 2009 at 9:54am
I = (induced emf)/R

Induced emf = (area)(dB/dt)* cos 30
dB/dt = 0.03 T/s
Area = (pi/4)R^2 = 7.85*10^-3 m^2

I do not agree with your answer

Answer this Question

Related Questions

Physics - Would someone check this please? A circular loop of wire of radius 0....
Physics - Would someone check this please? A circular loop of wire of radius 0....
Physics repost - Please help!! I have tried everything and is still coming up ...
Physics - A 2.00 cm x 2.00 cm square loop of wire with resistance 1.30×10...
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 ...
Ap physics b - A piece of copper wire is formed into a single circular loop of ...
Physics repost - I know I have posted this question before but I have tried ...
physics, university - A length of wire has a radius of 3.00 x 10-3 m and a ...
Tj - a wire has a resistance of 10 ohms. The length of the wire is doubled, and ...

For Further Reading

First Name:
School Subject:
Answer: