A student made an electromagnet using an iron bolt, copper wire coiled three times around the bolt, and a battery. How can he increase the strength of his magnet?(1 point)
Responses
Add batteries to decrease the voltage, and decrease the space between the coils of wire.
Add batteries to decrease the voltage, and decrease the space between the coils of wire.
Add batteries to increase the voltage, and decrease the space between the coils of wire.
Add batteries to increase the voltage, and decrease the space between the coils of wire.
Add batteries to decrease the voltage, and increase the space between the coils of wire.
Add batteries to decrease the voltage, and increase the space between the coils of wire.
Add batteries to increase the voltage, and increase the space between the coils of wire.
Add batteries to increase the voltage, and decrease the space between the coils of wire.
The correct response is: Add batteries to increase the voltage, and decrease the space between the coils of wire.
To increase the strength of the electromagnet, the student can do two things:
1. Add batteries to increase the voltage: The strength of an electromagnet is directly proportional to the amount of current passing through it. By increasing the voltage (i.e., the potential difference), the student will increase the current flowing through the copper wire coil, ultimately resulting in a stronger magnetic field.
2. Decrease the space between the coils of wire: The magnetic field produced by an electromagnet is concentrated within the coil. By decreasing the space between the coils of wire, the magnetic field lines will be closer together and more concentrated, resulting in a stronger magnet.
Therefore, the correct answer is: "Add batteries to increase the voltage, and decrease the space between the coils of wire."