Question

A student was investigating the effect of the size of the current flowing on the strength of an electromagnet

Suggest two important potential variables she would need to control to make her investigation a fair test​

Answer 1

the student should use the same type and size of iron core for each current level tested

Step-by-step explanation:

To make the investigation a fair test, the student would need to control for variables that could affect the strength of the electromagnet other than the size of the current flowing through it. Two important potential variables to control are:

The number of turns in the coil: The number of turns in the coil can affect the strength of the electromagnet. More turns in the coil can increase the strength of the electromagnet, and fewer turns can decrease it. Therefore, the student should use the same number of turns in the coil for each current level tested.

The type and size of the iron core: The type and size of the iron core can also affect the strength of the electromagnet. A larger or different type of iron core can increase or decrease the strength of the electromagnet, respectively. Therefore, the student should use the same type and size of iron core for each current level tested