Which of the following defines "touch potential" accurately?

The concept of "touch potential" is accurately defined as the voltage difference between points of contact on a person's body. This situation is particularly relevant in electrical safety. When a person touches a grounded object while standing on a surface that is at a different electrical potential due to a nearby live wire, there can be a voltage difference between the points where the person makes contact with the electrical system, such as their hands or feet.

This voltage difference can lead to a potentially dangerous electrical shock, as the current may pass through the person's body from one contact point to another. Understanding touch potential is crucial for linemen and electrical workers to ensure safety measures are in place to prevent accidents when working in environments with high-voltage systems.

The other options do not accurately capture the definition of touch potential. For instance, the voltage between grounded objects (the first choice) or the voltage difference between a live wire and the ground (the second choice) involves broader electrical concepts and does not specifically pertain to the human body's interaction with the electrical field. Similarly, the voltage difference across a circuit (the fourth option) relates to overall electrical flow rather than the specifics of how voltage can affect a person's body during contact scenarios.