A Straight Wire Carries a Current of 40 a in a Uniform

question 80

Multiple Choice

A straight wire carries a current of 40 A in a uniform magnetic field (magnitude = 80 mT) . If the force per unit length on this wire is 2.0 N/m, determine the angle between the wire and the magnetic field.

• A) either 39° or 141°
• B) either 25° or 155°
• C) either 70° or 110°
• D) either 42° or 138°
• E) either 65° or 115°

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