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1) Jumper cables used to start a stalled vehicle oen carry a 70-A current. How strong...

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Physics

1) Jumper cables used to start a stalled vehicle oen carry a70-A current. How strong is the magnetic field 5.0 cm from onecable? Compare to the Earth’s magnetic field (5.0 × 10−5 T).

2) A power line carries a current of 100 A west along the topsof 10-m-high poles. (a) What is the magnitude and direction of themagnetic field produced by this wire at the ground directly below?How does this compare with the Earth’s magnetic eld of about 1 2 G?(b) Where would the wire’s magnetic field cancel the Earth’sfield?

Answer & Explanation Solved by verified expert
3.6 Ratings (338 Votes)
Solution 1 Let us go to the basics first Just apply the magnetic field formula B UoI 2pir B 4pi107 70A 2pi 005m B 28 x 104 Tesla Answer1 Compare to the Earths magnetic field 50 105 T    See Answer
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