{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

24_Chapter 20 HomeworkCH20 Induced Voltages and Inductance

24_Chapter 20 HomeworkCH20 Induced Voltages and Inductance...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
198 CHAPTER 20 (b) The induced current through the axle will cause the magnetic field to exert a retarding force of magnitude r F BI = A v on the axle. The direction of this force will be opposite to that of the velocity G so as to oppose the motion of the axle. If the axle is to continue moving at constant speed, an applied force in the direction of v G and having magnitude app r F = ( ) F must be exerted on the axle. ( ) )( 0.80 0 A 10.8 N app F BI = = = A 0 T 9.0 1.50 m (c) Using the right-hand rule, observe that positive charges within the moving axle experience a magnetic force toward the rail containing point b , and negative charges experience a force directed toward the rail containing point a . Thus, the rail containing b will be positive relative to the other rail. Point is then at a higher potential than b a , and the current goes from
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online