Q.

Which statement accurately describes the strength of the magnetic field near a current-carrying wire?

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a

The magnetic field strength is stronger near the wire.

b

The magnetic field strength is the same at all distances from the wire.
 

c

The magnetic field strength is weaker near the wire.

d

The magnetic field strength varies unpredictably near the wire.

answer is B.

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Detailed Solution

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The magnetic field strength is stronger near the wire is the correct out of these.

The magnetic field strength around a current-carrying wire is stronger near the wire itself. This phenomenon is a result of the relationship described by Ampere's Law and the Biot-Savart Law

As you move farther away from the wire, the magnetic field strength decreases, leading to a weaker magnetic influence compared to the region closer to the wire. 

This principle is important in understanding the behaviour of magnetic fields produced by current-carrying conductors.

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