A Flexible,circular Conducting Loop of Radius 0

question 54

Multiple Choice

A flexible,circular conducting loop of radius 0.15 m and resistance 4.0 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