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21.61. Set Up:
Wires
A
and
C
have a length of 0.500 m and wire
D
has a length of
where
v
is the component of velocity perpendicular to the field direction and perpendicular to the bar.
Solve: (a)
is parallel to
so the induced emf is zero.
(b)
is perpendicular to
The component of
perpendicular to the bar is
(c)
is perpendicular to
The component of
perpendicular to the bar is
Reflect:
The induced emf depends on the angle between
and
and also on the angle between
and the bar.
21.62. Set Up:
The energy stored in a capacitor is
The energy stored in an inductor is
Energy conservation requires that the total stored energy be constant. The current is a maximum when the charge on
the capacitor is zero.
Solve: (a)
At this instant
(b)
At this instant
(c)
This is when
21.63. Set Up:
Use
to find the amount of heat energy that must go into the water. The energy stored in
an inductor is
Solve:
This much energy must be stored in
the inductor, so
This is a huge current; not reasonable for ordinary inductors.
Reflect:
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This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.
 Spring '07
 Shoberg

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