Question

describing the function of galvanometers
use the drop - down menus to complete the passage.
a galvanometer detects an electric current by showing needle movement in
if the wires in this galvanometer are attached to the terminals of a battery, th and point of wire. if the wires to th switched, the needle wil dire needle can be altered a strong

Explanation:

A galvanometer operates based on the principle of electromagnetic induction. When an electric current flows through a wire, it creates a magnetic field around the wire. The needle in a galvanometer is affected by this magnetic field. So, the second blank should be filled with "a magnetic field" as the needle movement is in response to the magnetic field created by the current - carrying wire.

Answer:

a magnetic field