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In this lesson, we will learn how to calculate the magnitude of the magnetic field produced by a long straight current-carrying wire at a given distance from the wire.
The magnitude of the magnetic field 50 cm from a
long, thin, straight wire is 8.0 µT. What is the current
through the long wire?
A long, straight, horizontal wire carries a left-to-right
current of 20 A. If the wire is placed in a uniform magnetic
field of magnitude
T that is directed vertically
downward, what is the resultant magnitude of the magnetic
field 20 cm above the wire?
A typical current in a lightning bolt is
A. Estimate the magnetic field 5.0 m from the bolt.
A transmission line strung
above the ground carries a
What is the magnetic field on the ground directly below the wire?
The figure shows two long straight horizontal wires that are parallel
and a distance
If the wires carry currents
A, in opposite directions, at what distance between them from
the top wire is the net magnetic field zero?
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