The magnetic field 35.0 cm away from along, straight wire carrying current 9.00A
ID: 1737926 • Letter: T
Question
The magnetic field 35.0 cm away from along, straight wire carrying current 9.00A is 5.14 µT. (a) At what distance is it 0.400 µT?cm
(b) At one instant, the two conductors in a long householdextension cord carry equal 9.00 A currentsin opposite directions. The two wires are 3.00 mm apart. Find themagnetic field 35.0 cm away from themiddle of the straight cord, in the plane of the two wires.
nT
(c) At what distance is it one tenth as large?
cm
(d) The center wire in a coaxial cable carries current 9.00 A in one direction, and the sheath around itcarries current 9.00 A in the oppositedirection. What magnetic field does the cable create at pointsoutside?
nT
(a) At what distance is it 0.400 µT?
cm
(b) At one instant, the two conductors in a long householdextension cord carry equal 9.00 A currentsin opposite directions. The two wires are 3.00 mm apart. Find themagnetic field 35.0 cm away from themiddle of the straight cord, in the plane of the two wires.
nT
(c) At what distance is it one tenth as large?
cm
(d) The center wire in a coaxial cable carries current 9.00 A in one direction, and the sheath around itcarries current 9.00 A in the oppositedirection. What magnetic field does the cable create at pointsoutside?
nT
Explanation / Answer
(a) At what distance is it 0.400 µT?Mag field from a long straight wire is inversely proportionalto distance. So you have: . Mag field #1 * distance #1 = Mag field # 2 * distance #2 . 5.14 * 35.0 = 0.400 * d . d = 450 cm
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