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

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 electromagnets will be equally strong.

Answer 1

The best comparison is:

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

Increasing the number of coils in an electromagnet generally increases its strength, as more wire wraps around the core create a stronger magnetic field when current flows through the coils. However, it may not be exactly twice as strong; the relationship is not strictly linear due to other factors like wire resistance and current limits. But, qualitatively, the electromagnet with more coils will be stronger.