A compass needle points 23° E of N outdoors. However, when
Chapter 15, Problem 40P(choose chapter or problem)
Problem 40P
A compass needle points 23° E of N outdoors. However, when it is placed 12.0 cm to the cast of a vertical wire inside a building, it points 55° E of N. What are the magnitude and direction of the current in the wire? The Earth’s field there is 0.50 × 10−4 T and is horizontal.
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