Acompass needle normally points toward earth’s magnetic pole, which is near the north pole. which best explains why the needle moves away from the pole when it comes close to a current-carrying wire? current within the wire weakens the magnetic force of the pole. magnetism surrounding the wire weakens the magnetic force of the pole. current within the wire draws the needle toward the wire. magnetism surrounding the wire draws the needle toward the wire.

Magnetism surrounding the wire draws the needle toward the wire.

Explanation:

As we know that the magnetic field due to current carrying long wire near a point of wire is given by

here we know that

i = current in the wire

r = distance from the wire

now when we place the wire near the compass then the magnetic field produced by the wire will attract the compass towards the wire and due to this the needle will come closer to the wire

so here correct answer will be

Magnetism surrounding the wire draws the needle toward the wire.

you would expect a sound wave to speed up. - b)