Magnetic levitation A metal rod of length w= 12 cm and mass m = 50 grams has metal loops at both ends, which go around two metal poles (see the figure). p- mass of rod The rod is in good electrical contact with the poles but can slide freely up and down. The metal poles are connected by wires to a battery, and a current I= 8 amperes flows through the rod. A magnet supplies a large uniform magnetic field B in the region of the rod, large enough that you can neglect the magnetic fields due to the 8 ampere current. The large magnetic field is oriented to have the maximum effect. The rod floats at rest h-9 cm above the table. What is the magnetic field in the region of the rod? Assume +x is to the right, +y is up, and +z is out of the page. B- <0,0,.91875 > Which of the following statements are true? 2 If the conventional current in the bar were less than 8 A, the bar would fall. O The magnetic force on the bar is in the +y direction (upward). O If the conventional current in the bar flowed in the opposite direction (to the left), the bar would still float at rest 9 cm above the table.
Magnetic levitation A metal rod of length w= 12 cm and mass m = 50 grams has metal loops at both ends, which go around two metal poles (see the figure). p- mass of rod The rod is in good electrical contact with the poles but can slide freely up and down. The metal poles are connected by wires to a battery, and a current I= 8 amperes flows through the rod. A magnet supplies a large uniform magnetic field B in the region of the rod, large enough that you can neglect the magnetic fields due to the 8 ampere current. The large magnetic field is oriented to have the maximum effect. The rod floats at rest h-9 cm above the table. What is the magnetic field in the region of the rod? Assume +x is to the right, +y is up, and +z is out of the page. B- <0,0,.91875 > Which of the following statements are true? 2 If the conventional current in the bar were less than 8 A, the bar would fall. O The magnetic force on the bar is in the +y direction (upward). O If the conventional current in the bar flowed in the opposite direction (to the left), the bar would still float at rest 9 cm above the table.
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Chapter1: Units, Trigonometry. And Vectors
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Transcribed Image Text:Magnetic levitation
A metal rod of length w = 12 cm and mass m = 50 grams has metal loops at both ends, which go around two metal poles (see the figure).
m = mass of rod
h
The rod is in good electrical contact with the poles but can slide freely up and down. The metal poles are connected by wires to a battery, and a current I = 8 amperes flows through the rod. A magnet supplies a large uniform magnetic field B in the region of the rod, large enough that you can neglect the
magnetic fields due to the 8 ampere current. The large magnetic field is oriented to have the maximum effect.
The rod floats at rest h = 9 cm above the table. What is the magnetic field in the region of the rod? Assume +x is to the right, +y is up, and +z is out of the page.
B =
< 0,0,.91875 >
Which of the following statements are true?
V If the conventional current in the bar were less than 8 A, the bar would fall.
V The magnetic force on the bar is in the +y direction (upward).
O If the conventional current in the bar flowed in the opposite direction (to the left), the bar would still float at rest 9 cm above the table.
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