Question

which characteristic is associated with an ec hairdryer motor compared to ac and dc motors? select the correct response: noisiest least expensive longest life span least airflow and heat

Explanation:

EC (Electronically Commutated) motors combine benefits of AC and DC motors. They have fewer moving parts that wear out compared to traditional AC/DC motors, resulting in a longer operational lifespan. They are quieter than many AC motors, more efficient (so not the least airflow/heat), and typically more costly than basic AC/DC motors, making "longest life span" the correct characteristic.

Answer:

longest life span