A Flexible, Circular Conducting Loop of Radius 0 $\varOmega$ Lies in a Uniform Magnetic Field of 0

question 59

Multiple Choice

A flexible, circular conducting loop of radius 0.15 m and resistance 4.0 $\varOmega$ lies in a uniform magnetic field of 0.25 T. The loop is pulled on opposite sides by equal forces and stretched until its enclosed area is essentially zero m², as suggested in the drawings. It takes 0.30 s to close the loop.
-At what rate is heat generated in the loop?

• A)3.6 × 10^-3 W
• B)8.7 × 10^-4 W
• C)8.7 × 10⁴ W
• D)8.1 × 10⁵ W
• E)8.1 × 10^-5 W