An electromagnet in a galvanometer
A. Increases the voltage in a circuit
B. moves a pointer along a numbered scale in response to a current.
C. induces an electric current.
D. increases the current in a circuit.
I got A, but apparently that is wrong....a little help?
a galvanometer measures current
an electromagnet is the active element
try B.
Okay thanks
thank you
To determine the correct answer, let's break down the options and reasoning behind each one:
A. Increases the voltage in a circuit: This option is not correct. An electromagnet in a galvanometer does not increase voltage in a circuit. Galvanometers are primarily used for measuring current, not voltage.
B. Moves a pointer along a numbered scale in response to a current: This option is correct. Galvanometers work based on the principle of the magnetic effect of electric current. When an electric current flows through the galvanometer, it creates a magnetic field that interacts with the magnet attached to the pointer, causing the pointer to move along a numbered scale.
C. Induces an electric current: This option is not specific to the function of an electromagnet in a galvanometer. While an electromagnet can indeed induce an electric current in a nearby conductor when the current in the electromagnet changes, this is not the primary purpose of the electromagnet in a galvanometer.
D. Increases the current in a circuit: This option is not correct. Again, the role of an electromagnet in a galvanometer is to measure current, not increase it.
Therefore, the correct answer is B. An electromagnet in a galvanometer moves a pointer along a numbered scale in response to a current.