Final answer:
The statement is true; voltages of 1 million volts or more are indeed termed as ultra-high voltages and are used in special, high-voltage applications. Standard power transmission uses lower voltages, and special insulation and safety measures are required for high-voltage systems.
Step-by-step explanation:
True or False - Voltages of 1 million volts or more are classified as ultra-high voltages or experimental voltages. The statement is True. Voltages at such high levels indeed fall into the category of ultra-high voltages and are often utilized for experimental purposes or in high-voltage research facilities. In the context of electrical transmission, voltages ranging from 120 to 700 kV (kilovolts) are typically used for transmitting power over long distances. Voltages such as 15 million volts, which are much higher than the transmission ranges, are considered well within the capabilities of certain specialized equipment and are within practical limits for certain applications, as mentioned. However, these voltages are significantly higher than what is used in standard power transmission and hence can be classified as ultra-high or experimental.
Voltage, often synonymous with potential difference, is indicative of the electric potential energy per unit charge at a given point in space and drives the movement of electric charges in a circuit, which results in an electric current. High-voltage systems require special insulation and safety measures to operate securely. For example, high-voltage wires are suspended by insulating connectors but contrary to common belief, they are not wrapped in an insulating material.