The magnetic field 38.0 cm away from a long, straight wire carrying current 4.00 A is...

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Physics

The magnetic field 38.0 cm away from a long, straight wirecarrying current 4.00 A is 2110 nT.
(a) At what distance is it 211 nT?
380 cm

(b) At one instant, the two conductors in a long householdextension cord carry equal 4.00-A currents in opposite directions.The two wires are 3.00 mm apart. Find the magnetic field 38.0 cmaway from the middle of the straight cord, in the plane of the twowires.
16.6 nT

(c) At what distance is it one-tenth as large?
_______________________cm

(d) The center wire in a coaxial cable carries current 4.00 A inone direction, and the sheath around it carries current 4.00 A inthe opposite direction. What magnetic field does the cable createat points outside the cables?
0 nT

Answer & Explanation Solved by verified expert

4.5 Ratings (944 Votes)

As I can see you only need help with part C If you need help with any other part A or D comment below Part B Magnetic field due to current carrying wire is given by B u0i2pir Now since current is in opposite direction So net magnetic See Answer

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