Final answer:
An electrolytic capacitor is indeed used in single-phase resistance split-phase motors to provide a necessary phase shift for motor startup, which makes the statement true.
Step-by-step explanation:
The statement that an electrolytic capacitor is used in single-phase resistance split-phase motors is true. Electrolytic capacitors are commonly employed in these motors to provide the necessary phase shift between the current in the main winding and the current in the start winding. This phase shift is crucial for the start-up of the motor, as it helps in creating a rotating magnetic field that initiates the motor's rotation. When it comes to capacitors and dielectrics, inserting a dielectric between the plates of a capacitor generally increases the capacitor's ability to store charge, thereby increasing the energy of the capacitor.