A Flat Circular Coil Has 200 Identical Loops of Very $\vec { B }$

question 104

Multiple Choice

A flat circular coil has 200 identical loops of very thin wire.Each loop has an area of 0.12 m² and carries 0.50 A of current.This coil is placed in a $\vec { B }$ field of 0.050 T oriented at 30° to the plane of the loop.What is the magnitude of the magnetic torque exerted on the coil?

• A)0.25 N ∙ m
• B)0.52 N ∙ m
• C)2.5 N ∙ m
• D)5.2 N ∙ m

---

Definitions:

Closed System

A system that does not interact with its environment and does not exchange matter or energy with the outside.

Disinfectant

A chemical substance used to eliminate or inhibit the growth of harmful microorganisms.

Prefix

A syllable or word placed at the beginning of another word to alter its meaning.

Dis-

A prefix used to denote negation, removal, or expulsion.