a student is measuring the effects of an electrical circut on a compass, and he is testing to see if increasing the current will cause the compass needle to change its direction faster. He does one trial using a 9-volt battery and another trial using a 1.5-volt battery. He takes accurate data. Based on good experimental design, which would improve his experiment?

A.He should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups.

Question

a student is measuring the effects of an electrical circut on a compass, and he is testing to see if increasing the current will cause the compass needle to change its direction faster. He does one trial using a 9-volt battery and another trial using a 1.5-volt battery. He takes accurate data. Based on good experimental design, which would improve his experiment?

A.He should use only one battery but do several trials, using different circuit designs to ensure he has appropriate test groups.

allison1738 · Answer

B. He should repeat the test with three additional batteries of varying voltages to demonstrate the reproducibility of results.

allison1738 · Answer

C.He should add a nonworking compass to act as a control.

allison1738 · Answer

D.He should use batteries of the same voltage but from different manufacturers, to show he has used different variables.

allison1738 · Answer

@jabez177 Help -.-

jabez177 · Answer

I remember this question from a year back but at the moment, I do not remember it. :/
Sorry.

eatme · Answer

what do u think is the answer??

allison1738 · Answer

I wish I knew. I didn't even read it hun xD

allison1738 · Answer

Screw it -_- An F it is.