Problem a compass needle point 19o e of n outdoors however, Ask an Expert

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Problem: A compass needle point 19o E of N outdoors. However, when it is placed 14.0cm to the east of a vertical wire inside a building, it points 29^o E of N. The Earth's field is the same at both positions of the compass; it is 0.50 × 10⁴ T and is horizontal.

Part A: What is the magnitude of the current in the wire?

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