## College Physics (7th Edition)

Published by Pearson

# Chapter 19 - Magnetism - Learning Path Questions and Exercises - Conceptual Questions - Page 690: 19

#### Answer

a). SI units of $IAB=(A)(m^{2})((T)=\frac{C}{s}\times m^{2}\times \frac{N}{C.(m/s)}=N.m$ which is the SI unit for torque. b). If we are looking down onto an area of current-carrying loop and the current is counterclockwise, by right hand rule, the magnetic moment is out of the page towards us.

#### Work Step by Step

a). SI units of $IAB=(A)(m^{2})((T)=\frac{C}{s}\times m^{2}\times \frac{N}{C.(m/s)}=N.m$ which is the SI unit for torque. b). If we are looking down onto an area of current-carrying loop and the current is counterclockwise, by right hand rule, the magnetic moment is out of the page towards us.

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