Create assignment, 57112, Homework 13, Sep 01 at 11:29 am
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The due time is Central
time.
Covers 29.129.3
Induced EMF in a Coil
31:01, calculus, numeric,
>
1 min, normal.
001
A 30 turns circular coil with a radius 4 cm
and a resistance 1
Ω
is placed in a magnetic
field directed perpendicular to the plane of
the coil. The magnitude of the magnetic field
varies in time according to the expression
B
=
a
1
t
+
a
2
t
2
,
where
a
1
= 0
.
01 T
/
s,
a
2
= 0
.
04 T
/
s
2
are
constants, time
t
is in seconds and field
B
is
in Tesla.
Calculate the magnitude of the induced
E
in the coil at
t
= 5 s. Answer in units of V.
Applied Force on a Bar 02
31:02,
trigonometry,
numeric,
>
1
min,
wordingvariable.
002
In the arrangement shown in the figure, the
resistor is 5
Ω
and a 4 T magnetic field is
directed out of the paper.
The separation
between the rails is 3 m
.
Neglect the mass of
the bar.
An applied force moves the bar to the left
at a constant speed of 2 m
/
s
.
Assume the
bar and rails have negligible resistance and
friction.
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 Spring '08
 Turner
 Work, Electromotive Force, Magnetic Field, Faraday's law of induction

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