Students built two electromagnets. The electromagnets are the same except that one has 20 wire coils around its core, and the other has 40 wire coils around its core. Which is the best comparison?(1 point)

Question

Responses

The electromagnet with 40 coils will be stronger than the electromagnet with 20 coils.
The electromagnet with 40 coils will be stronger than the electromagnet with 20 coils.

The electromagnet with 40 coils will be exactly twice as strong as the electromagnet with 20 coils.
The electromagnet with 40 coils will be exactly twice as strong as the electromagnet with 20 coils.

The electromagnets will be equally strong.
The electromagnets will be equally strong.

The electromagnet with 20 coils will be stronger than the electromagnet with 40 coils.

Answer 1

The best comparison is:

The electromagnet with 40 coils will be stronger than the electromagnet with 20 coils.

Generally, an electromagnet's strength is proportional to the number of coils of wire around its core. Therefore, having more coils (in this case, 40 coils compared to 20 coils) will increase the strength of the electromagnet. However, the statement about the electromagnet with 40 coils being "exactly twice as strong" is not accurate, as the relationship is not strictly linear. Thus, the first option is the most accurate response.