Question

inner workings of an electric motor
coils of
wire
n
s
permanent
magnet
permanent
magnet
comm
lo power source
what step should the students take next in the investigation to increase the strength of the motor?
a increase the number of coils of wire within the two sections of the motor.
b decrease the voltage of the power source being used to operate the motor.
c place the permanent magnets and coils of wire farther apart inside the motor.

Explanation:

To increase the strength of an electric motor, we analyze the options:

• Option A: Increasing the number of wire coils increases the magnetic field produced by the current - carrying coils, which enhances the motor's strength (since the motor works on the interaction between magnetic fields of the coils and permanent magnets).
• Option B: Decreasing the voltage of the power source will decrease the current in the coils, reducing the magnetic field and thus the motor's strength.
• Option C: Placing magnets and coils farther apart reduces the interaction between their magnetic fields, decreasing the motor's strength.

Answer:

A. Increase the number of coils of wire within the two sections of the motor.