WVGSA Grade 8 Science Practice Questions - West Virginia General Summative Assessment Grade 8 Science Exam

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A student builds an electromagnet by wrapping copper wire around an iron nail connected to a battery. How can the student increase the magnetic field strength of the electromagnet?

Increase the number of wire coils around the nail and increase electrical current Remove the iron nail core and use plastic instead Decrease the current by using a weaker battery Uncoil the wire so it forms a straight line

Correct Answer:

Increase the number of wire coils around the nail and increase electrical current

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