Question

1. swing the top part of the extension cord as if a person were to enter to jump rope. 5. have a student observe the galvanometer while the cord is rotating. dashed lines indicate the spinning extension cord galvanometer cord close to galvanometer taped to floor students observed that the needle of the galvanometer moves. what does this demonstrate? a. moving an electrical conductor through earths magnetic field induces an electric current. b. moving an electrical conducting wire through a magnetic field changes the wires conductivity. c. moving an electrical conducting wire close to the ground changes earths magnetic field. d. moving an electrical conductor next to an electric current produces a magnetic field.

Explanation:

The galvanometer measures electric current. When the extension cord (an electrical conductor) is swung, it moves through Earth's magnetic field, inducing an electric current which causes the galvanometer needle to move. This is in line with Faraday's law of electromagnetic - induction.

Answer:

A. Moving an electrical conductor through Earth's magnetic field induces an electric current.