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One group clearly won the challenge. What aspects of the winning design accounted for the strength of Group #2's electromagnet?

Responses
A They used a 9-volt battery for more electrical energy.They used a 9-volt battery for more electrical energy.
B They added more turns of wire around the core and a 9-volt battery.They added more turns of wire around the core and a 9-volt battery.
C They used a double-nail core and more turns of wire around that core.They used a double-nail core and more turns of wire around that core.
D The group kept the switch on all the time instead of turning it off and on.The group kept the switch on all the time instead of turning it off and on.
Question 2
The instructor asked the student groups to summarize the results of all four trials in order to draw a conclusion regarding the strength of electromagnets. Which statement is the MOST accurate based on the student data?
Responses
A Electromagnetic strength is the result of using the correct material for the core with the maximum voltage source.Electromagnetic strength is the result of using the correct material for the core with the maximum voltage source.
B Electromagnetic strength is the result of combining maximum voltage with maximum coils of wire around the iron core.Electromagnetic strength is the result of combining maximum voltage with maximum coils of wire around the iron core.
C Electromagnetic strength is the result of combining the maximum coils of wire around the largest iron core available.Electromagnetic strength is the result of combining the maximum coils of wire around the largest iron core available.
D Electromagnetic strength is the result of three factors: the largest core, the greatest voltage source and the maximum wire coils.

1 answer

For the first question regarding the strength of Group #2's electromagnet, the best response would be:

B: They added more turns of wire around the core and a 9-volt battery.
This option highlights two significant factors that enhance the strength of an electromagnet: the number of wire turns (which increases the magnetic field) and the voltage of the battery (which provides more electrical energy).

For the second question regarding the most accurate statement based on the student data:

D: Electromagnetic strength is the result of three factors: the largest core, the greatest voltage source, and the maximum wire coils.
This response comprehensively encompasses the various factors that can impact the strength of an electromagnet, acknowledging that multiple elements contribute to its effectiveness.