Which statement is correct regarding the connection of the terminals in the circuit?

The statement indicating that neither the positive nor the negative terminal is connected to ground is correct in specific circuit configurations, particularly in isolated or floating systems. In such systems, the terminals are not referenced to the ground, which allows for various operational characteristics, such as reducing ground loop interference or maintaining maximum circuit isolation.

In circuits where no terminal is connected to ground, the signal reference is typically defined by the equipment or device characteristics instead of relying on a common ground. This setup can be beneficial in some applications, such as when measuring signals in environments with high electromagnetic interference or when working with sensitive equipment that could otherwise introduce noise from ground connections.

Therefore, the understanding of whether or not terminals are grounded is crucial for circuit design, influencing stability, performance, and safety in electronic systems.