A. String, battery, iron nail
B. Battery, iron nail, wire
C. glass rod, wire, battery
D. Rubberband, string, battery
9 answers
To create an electromagnet capable of picking up small pieces of metal like paper clips or iron filings, Natasha would need materials that can generate a magnetic field when electricity is passed through them. The correct choice would be:
B. Battery, iron nail, wire
In this setup, the wire is wrapped around the iron nail, and when the battery is connected, electricity flows through the wire, creating a magnetic field around the nail, thus turning it into an electromagnet.
Based on the results of Experiment 2, the question that can be answered is:
C. How is the strength of an electromagnet affected by the voltage of the battery?
This is because Experiment 2 involves varying different battery voltages while keeping the number of coils constant and recording the number of paperclips picked up, which directly indicates the strength of the electromagnet at different voltages.
A A. Generator converts mechanical energy to electrical energy.
Generators work by converting kinetic energy (from mechanical movement) into electrical energy through electromagnetic induction.
The conclusion the student can draw is:
D. More coils of wire increases the strength of the electromagnet.
This observation is consistent with the principle that increasing the number of coils around the core (in this case, the iron nail) enhances the magnetic field strength generated by the electromagnet, allowing it to pick up more paperclips.
The conclusion the student can make based on the evidence from her experiment is:
C. Magnetic fields can be observed between objects that are not touching.
This is supported by the fact that the paperclip is attracted to the magnet even when there is a distance between them, demonstrating the existence of a magnetic field that extends beyond the physical contact between the magnet and the paperclip.
