a student wraps 10 coils of copper wire around an iron bolt, and then she connects the end of the wire to a battery next the student uses the nail to lift paper clip, she then conducts a second trial using the same wire, battery, and nail but 30 coils of copper wire wrapped around the bolt what will happen.
A. the bolt will lift the same number of paper clips because both trials used the same type of battery
B. the bolt will lift the same number of paper clips because both trials used the same type of paper clips
C. the bolt will life more paper clips because more coils of wire produces a stronger magnetic field.
D. the bolt will life more paper clips because more conductive material in the system will balance more paper clips
C. the bolt will lift more paper clips because more coils of wire produces a stronger magnetic field.
The strength of the magnetic field in an electromagnet, such as the one created by wrapping wire around an iron bolt and connecting it to a battery, is directly related to the number of turns of wire around the core and the current passing through the wire. By increasing the number of coils from 10 to 30 while keeping the same battery (and thus the same voltage and assuming the resistance of the wire doesn't significantly change to affect the current), the strength of the magnetic field generated by the electromagnet is increased, meaning the bolt will be able to lift more paper clips in the second trial compared to the first.