an electric current is created in a long thin wire. how will increasing the current and changing the…

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?\na it compass will spin continuously.\nb the compass will flip exactly 180 degrees.\nc the compass will spin exactly 360 degrees.\nd the compass will not react and still point north.

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?\na it compass will spin continuously.\nb the compass will flip exactly 180 degrees.\nc the compass will spin exactly 360 degrees.\nd the compass will not react and still point north.

Answer

Answer:

B. The compass will flip exactly 180 degrees.

Explanation:

Step1: Recall magnetic - field principle

A current - carrying wire produces a magnetic field.

Step2: Understand the effect of current direction

The direction of the magnetic field around a current - carrying wire is given by the right - hand rule. Changing the direction of the current changes the direction of the magnetic field.

Step3: Analyze compass behavior

A compass needle points in the direction of the magnetic field. When the direction of the magnetic field around the wire (due to current change) is reversed, the compass needle, which aligns with the magnetic field, will flip 180 degrees.