How does adding an iron bar to a solenoid affect the magnetic field of the electromagnet?
a. it changes the magnetic field to a current.
b. it changes the magnetic field’s direction.
c. it increases the magnetic field’s strength.
d. it decreases the magnetic field’s strength.

The correct answer is Option c.

Explanation:

When a current carrying wire is coiled around a metallic piece, it generates a magnetic field around the metallic piece. It is called as a solenoid.

When iron bar is added in the solenoid, iron being itself magnetic substance will thus, increase the magnetic field strength around the electromagnet.

Hence, the correct answer is Option c.

the answer is na (sodium)

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