Question

which of the following measurement tools would be useful in studying circuits that produce magnetic fields?
microscope
gyroscope
ammeter
camera

Explanation:

• A microscope is used to view tiny objects, not magnetic fields or circuit current related to them.
• A gyroscope measures angular velocity, unrelated to magnetic fields from circuits.
• An ammeter measures electric current; since magnetic fields in circuits are generated by electric current, this tool is useful for studying such circuits.
• A camera captures visual images, which does not help measure or study magnetic fields from circuits.

Answer:

ammeter