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  • A current of 5 A flows vertically upwards in a long straight vertical conductor and the earth’s horizontal flux density is 2 10^-7 T. Then the neural point is<stro

A current of 5 A flows vertically upwards in a long straight vertical conductor and the earth’s horizontal flux density is 2 10^-7 T. Then the neural point is

Option: 1

Due north 10m of the wire


Option: 2

Due east 10m of the wire


Option: 3

Due east 5m of the wire


Option: 4

Due west 5m of the wire


Answers (1)

best_answer

\mathrm{\frac{\mu_0}{2 \pi} \frac{1}{d}=2 \times 10^{-7}, \quad d=5 }
Direction with right hard rule

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