When electricity flows through a coil of wire, what does the resultant magnetic field resemble?
a. the magnetic field of a bar magnet.
b. the magnetic field of a horseshoe magnet.
c. the magnetic field around a straight wire.
d. the magnetic field around a circular magnetic disc.
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Ответ:
Ответ:
Explanation:
The vectors are:
Positions (in meter)Particle P
Particle Q
Velocities (in meter per second)Particle P
Particle Q
The rate of change of the relative positions of point P and Q is the relative velocity of one respect to the other.
The relative velocity of Q respect to P, in meter per second, is:
And the rate of change of the distance between points P and Q is the magnitude of the vector, which is 7m/s.