Final answer:
A grounding adapter must be connected to an electrical ground to perform its safety function; otherwise, it does no good, making the statement true.
Step-by-step explanation:
The answer to the question, 'A grounding adapter does no good if it is not connected to an electrical ground', is true. This statement is factual because the purpose of a grounding adapter is to provide a safe path for electricity to return to the ground in the event of a fault in the electrical device it is connected to. Without a proper ground connection, the grounding adapter would not be able to perform its safety function, and the risk of electric shock or damage to the equipment remains.