Why forces are generated for parts of the loop (actually rectangle in Fig 20-37) and not for other parts of the loop. Refer back to Fig 20-11 and the Force equation with sin theta (max force when theta is 90 degrees or perpendicular to magnetic field lines.) your experience applying the Right-Hand Rule to explain up and down forces acting together to generate clockwise motion of the armature

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter19: Magnetism
Section19.5: Magnetic Force On A Current -Carrying Conductor
Problem 19.3QQ: As a charged particle moves freely in a circular path in the presence of a constant magnetic field...
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Please type your Solutions so that they are easy to read I have bad eyesight 

N
Armature
Force
IS
down
F
S
Brushes
Voltage source
FIGURE 20-37 Diagram of a simple
de motor. (Magnetic field lines are
as shown in Fig. 20-36.)
22 V
(a)
FIGURE 20-11 (a) Force on a
current-carrying wire placed in a
magnetic field B; (b) same, but
current reversed; (c) right-hand rule
for setup in (b), with current I
shown as if a vector with direction.
Force is up
(b)
22 V
INDUSTRIAL
B
(c) Right-hand rule
Transcribed Image Text:N Armature Force IS down F S Brushes Voltage source FIGURE 20-37 Diagram of a simple de motor. (Magnetic field lines are as shown in Fig. 20-36.) 22 V (a) FIGURE 20-11 (a) Force on a current-carrying wire placed in a magnetic field B; (b) same, but current reversed; (c) right-hand rule for setup in (b), with current I shown as if a vector with direction. Force is up (b) 22 V INDUSTRIAL B (c) Right-hand rule
Why forces are generated for parts of the loop (actually rectangle in Fig 20-37) and not for other
parts of the loop. Refer back to Fig 20-11 and the Force equation with sin theta (max force
when theta is 90 degrees or perpendicular to magnetic field lines.)
your experience applying the Right-Hand Rule to explain up and down forces acting together to
generate clockwise motion of the armature
Transcribed Image Text:Why forces are generated for parts of the loop (actually rectangle in Fig 20-37) and not for other parts of the loop. Refer back to Fig 20-11 and the Force equation with sin theta (max force when theta is 90 degrees or perpendicular to magnetic field lines.) your experience applying the Right-Hand Rule to explain up and down forces acting together to generate clockwise motion of the armature
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