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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?

options:

Add batteries to increase 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.
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 decrease the voltage, and decrease the space between the coils of wire.

1 answer

To increase the strength of the electromagnet, the student can:

  1. Add batteries to increase the voltage. A higher voltage will push more current through the wire, which will produce a stronger magnetic field.
  2. Decrease the space between the coils of wire. Closer coils create a more concentrated magnetic field, enhancing the overall strength of the electromagnet.

So the correct option to increase the strength of the magnet is:

Add batteries to increase the voltage, and decrease the space between the coils of wire.