A Flat Circular Wire Loop of Area 0 $\vec { B }$

question 128

Multiple Choice

A flat circular wire loop of area 0.25 m² carries a current of 5.0 A.This coil lies on a horizontal table with the current flowing in the counterclockwise direction when viewed from above.At this point,Earth's $\vec { B }$ field is 1.2 × 10^-5 T directed 60° below the horizontal.What is the magnitude of the torque that Earth's magnetic field exerts on this loop?

• A)2.5 × 10^-6 N ∙ m
• B)5.0 × 10^-6 N ∙ m
• C)7.5 × 10^-6 N ∙ m
• D)1.0 × 10^-5 N ∙ m

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