A 15.0-cm horizontal wire of mass 15 g is placed between two thin, vertical conductors, in a region where a
Ampere Circuital Law
Ampere's Law states that "for any closed loop path, the sum of the length elements times the magnetic field in the direction of the length element is equal to the permeability times the electric current enclosed in the loop.”
Current Density
To design the electrical and electronic system, the current density is an important factor. The designer current level is the factor on which the circuit performance depends and with the help of the dimensions of the conducting current the current density is then determined. For instance, despite the lower current demanded by smaller devices as integrated circuits are reduced in size, there is a type of trend in achieving the higher device number in even smaller chip areas. The current density is increased in this region at higher frequencies because the conducting region in a wire becomes confined and this is known as the skin effect. The consequences increase as the current densities become higher.
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Q A 15.0-cm horizontal wire of mass 15 g is placed between two thin
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ecp Consider the system pictured in Figure P19.21.
O 15-cu length of conductor of mass 15 g, free to move verte
cally, is placed between two thin, vertical conductors, and
a uniform magnetic field acts perpendicular to the page.
When a 5.0-A current is directed as shown in the figure,
the horizontal wire moves upward at constant velocity in
the presence of gravity. (a) What forces act on the hori-
zontal wire, and under what condition is the wire able to
move upward at constant velocity? (b) Find the magnitude
and direction of the minimum magnetic field required to
move the wire at constant speed. (c) What happens if the
magnetic field exceeds this minimum value? (The wire
slides without friction on the two vertical conductors.)
15 cm
5.0 A
5.0 A
5.0 A
FIGURE P19.21
Chegg
انتقال
Consider The System Pictured In
Figure P19.21. A 1... | Chegg.com
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the wire able so move upward at conan
Fnd the magnitude and direcion of de
magneic eld requled to mose the wire a
1 What happens if the magoetic ft
this minimu
e wire slides withe te
15 cm](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F173196d1-677a-4d1f-942c-41d77819dc39%2Fe87a6f01-b38a-4380-8be3-508a72af2b44%2Frw6kgq9_processed.jpeg&w=3840&q=75)
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