In Oersted\'s experiment, suppose that the compass was 0.29 m from the current-c

Question

In Oersted's experiment, suppose that the compass was 0.29 m from the current-carrying wire.

If a magnetic field of half the Earth's magnetic field of 5.0 * 10-5T was required to give a noticeable deflection of the compass needle, what current must the wire have carried?

I=A

In Oersted's experiment, suppose that the compass was 0.29 m from the current-carrying wire.

If a magnetic field of half the Earth's magnetic field of 5.0 * 10-5T was required to give a noticeable deflection of the compass needle, what current must the wire have carried?

I=A

If a magnetic field of half the Earth's magnetic field of 5.0 * 10-5T was required to give a noticeable deflection of the compass needle, what current must the wire have carried?

I=A

Explanation / Answer

The formula to apply here is B = oI/2r

2.5 X 10-5 = (4 X 10-7)(I)/(2)(.29)

I = 36.25 A

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