relating electric current and magnetic fields\nwhich statements are true about moving the compass around the…

relating electric current and magnetic fields\nwhich statements are true about moving the compass around the wire? check all that apply.\nwith no current, the compass needle will not move.\nif the light bulb is on, the compass needle will move.\nif the circuit is on, compass needle movement will indicate a dead battery.\nif current is flowing, the compass needle will not move unless the compass is touching the wire.\nchanging the battery terminals will change the current flow and the compass will point differently.

relating electric current and magnetic fields\nwhich statements are true about moving the compass around the wire? check all that apply.\nwith no current, the compass needle will not move.\nif the light bulb is on, the compass needle will move.\nif the circuit is on, compass needle movement will indicate a dead battery.\nif current is flowing, the compass needle will not move unless the compass is touching the wire.\nchanging the battery terminals will change the current flow and the compass will point differently.

Answer

Brief Explanations:

  • When there is no current in the wire, there is no induced magnetic - field to affect the compass, so the compass needle will not move.
  • When the light - bulb is on, current is flowing in the circuit. A current - carrying wire produces a magnetic field which can cause the compass needle to move.
  • If the circuit is on and the compass needle moves, it indicates the presence of a magnetic field due to the current, not a dead battery.
  • Current flowing in a wire creates a magnetic field in the surrounding space, and the compass needle can move even without touching the wire.
  • Changing the battery terminals changes the direction of the current flow. Since the magnetic field direction depends on the current direction, the compass will point differently.

Answer:

  • With no current, the compass needle will not move.
  • If the light bulb is on, the compass needle will move.
  • Changing the battery terminals will change the current flow and the compass will point differently.