What is the magnetic moment of a rectangular loop having 120 turns that carries $6.0 \mathrm {~A}$ if its dimensions are $4.0 \mathrm {~cm} \times 8.0 \mathrm {~cm}$ ?
A) $2.3 \mathrm {~A} \cdot \mathrm { m } ^ { 2 }$
B) $23 \mathrm {~A} \cdot \mathrm { m } ^ { 2 }$
C) $0.23 \mathrm {~A} \cdot \mathrm { m } ^ { 2 }$
D) $230 \mathrm {~A} \cdot \mathrm { m } ^ { 2 }$

Question

Quizplus · Accepted Answer

The magnetic moment of a rectangular loop is given by:$$\mu = NIA$$where:* N is the number of turns* I is the current* A is the area of the loopPlugging in the given values, we get:$$\mu = (120)(6.0 \mathrm {~A})(4.0 \mathrm {~cm} 	imes 8.0 \mathrm {~cm}) = 23 \mathrm {~A} \cdot \mathrm { m } ^ { 2 }$$Therefore, the correct answer is A.

What Is the Magnetic Moment of a Rectangular Loop Having 6.0 A6.0 \mathrm {~A}6.0 A

What Is the Magnetic Moment of a Rectangular Loop Having $6.0 \mathrm {~A}$