Question 9 of 20 Which sentence best describes the function of an electric motor?
A. An electric motor uses electrical energy to produce magnetic
force.
B. An electric motor uses electrical energy to produce mechanical
energy
C. An electric motor uses mechanical energy to produce electrical
energy
D. An electric motor uses magnetic force to produce electrical
energy

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.