A magnetic field is generated by a current-carrying wire. Which one of the following statements concerning this situation is false?
a) The magnitude of this magnetic field decreases with increasing distance away from the wire.
b) A right-hand rule is useful for determining the direction of the magnetic field at a particular location.
c) The magnitude of the magnetic field is directly proportional to the magnitude of the current.
d) The magnetic field is parallel to the direction of the current in the wire.
Answer: d) The magnetic field is parallel to the direction of the current in the wire.
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