Question

The magnetic field around a current-carrying wire is proportional to the current and proportional to the distance from the wire. If the current triples while the distance doubles, the strength of the magnetic field increases by times.

Answer 1

directly

inversely

1.5

The magnetic field around a current-carrying wire is directly proportional to the current and inversely proportional to the distance from the wire. If the current triples while the distance doubles, the strength of the magnetic field increases by 1.5 times.

Answer 2

The magnetic field is dependent on the current and distance from the wire. If the current triples while the distance doubles, the strength of the magnetic field increases by 1.5 times.

What is magnetic field?

The magnetic field is the region of space in which an object experiences  the magnetic force.

The magnetic field B around a current-carrying wire is directly proportional to the current I and inversely proportional to the distance d from the wire.

B = I / d

If the current triples while the distance doubles, the strength of the magnetic field increases by

B' = 3I / 2d

B'= 1.5*( l / d)

B' = 1.5B

Thus, If the current triples while the distance doubles, the strength of the magnetic field increases by 1.5 times.

Learn more about magnetic field.

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