An electric current is created in a long thin wire. how will increasing the current and changing the direction of the current effect the direction that a compass placed under the wire will point?
a)
it compass will spin continuously.
b)
the compass will flip exactly 180 degrees.
c)
the compass will spin exactly 360 degrees.
d)
the compass will not react and still point north.

The correct answer is B.

Explanation:

When the current is flowing through the vertical wire then the compass needle will points perpendicular to the wire.

When the direction of the electric current is reversed then the direction of the compass needle will also get reversed as the polarity of the magnetic field is changed.

An electric current is created in a long thin wire. When the current will increase and the direction of the current is changed then the compass will flip exactly 180 degree.

Therefore, the correct answer is B.

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

they should be similar or the same