Which two statements are true?
the definitions for electric force and electromagnetic force are identical.
electric forces and magnetic forces are different aspects of a single electromagnetic force.
the operation of a motor depends on the relationship between electric and magnetic forces.
a magnet must be moving for a magnetic force field to exist.

These two statements are true:

"Electric forces" and "magnetic forces" are different aspects of a "single electromagnetic force".

The "operation of a motor" depends on the relationship between "electric force" and magnetic forces".

Option: B and C

Explanation:  

As per the definition of electromagnetic forces, Electromagnetic forces are fundamental forces that take place between electrically charged particles where it is responsible for "electrostatic force" while "magnetic force" carried between objects by "photons" and responsible for "magnetic field". Therefore "Electric force" and "magnetic force" are two important phase of "electromagnetic force". And operation of motor which converts "electrical energy" into "mechanical energy" is dependent on both of these forces.

c) always accurate

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