AA B (outward) (a) Force on eléctron (b) FIGURE 21-11 (a) A conducting rod is moved to the right on a U-shaped conductor in a uniform magnetic field B that points out of the page. The induced current is clockwise. (b) Upward force on an electron in the metal rod (moving to the right) due to B pointing out of the page; hence electrons can collect at the top of the rod, leaving + charge at the bottom.
AA B (outward) (a) Force on eléctron (b) FIGURE 21-11 (a) A conducting rod is moved to the right on a U-shaped conductor in a uniform magnetic field B that points out of the page. The induced current is clockwise. (b) Upward force on an electron in the metal rod (moving to the right) due to B pointing out of the page; hence electrons can collect at the top of the rod, leaving + charge at the bottom.
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies
Section: Chapter Questions
Problem 27PE: Figure 23.59 A coil is moved into and out of a region of uniform magnetic field. A coil is moved...
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(III) In Fig. 21–11, the rod moves with a speed of 1.16 m/s on
rails 30.0 cm apart. The rod has a resistance of 2.5Ω The
magnetic field is 0.35 T, and the resistance of the
conductor is 21.0Ω at a given instant. Calculate (a) the
induced emf, (b) the current in the conductor,
and (c) the external force needed to keep the rod’s velocity
constant at that instant.
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