A horizontail rod (oriented in the east -west direction) is moved northward at a
ID: 1698231 • Letter: A
Question
A horizontail rod (oriented in the east -west direction) is moved northward at a constant velocity through a magnetic field that points straight down. Make a statement concerning the potential induced across the rod.A) The east end of the rod is at higher potential than the west end.
B) The bottom surface of the rod is at higher potential than the top surface.
C) The top surface of the rod is at higher potential than the bottom surface.
D) The west end of the rod is at higher potential than the east end.
E) The potential is uniform.
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Please provide some insight? I see the induced potential across the rod as the same as moves across the Magnetic field?
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Explanation / Answer
As the current carrying conductor when placed in the magnetic field experiences the force and this force is perpendicular to the plane containing the magnetic feild and the current in the conductor.
As the magnetic field points straight down and the force experienced by the rod along north direction , hence by using the Flemings rule to find the direction of the current , we get current direction from west pointing to the east.
As we take conventional current direction from higher potential to the lower potential , hence the west end of the rod is at higher potential than the east end.
Hence option (D) is correct.
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