Potential difference is measured in Volts (shown as (V) or sometimes (E))
The most common unit of electrical potential is the Volt (V)
The potentiometer is the device that is used in the measuring of the potential difference.
the unit of length used in measuring long objects are yards and feet and inches.
The international unit is the kilogram.
unit in earth science used for measuring angles in a circle or sphere?
Joule.
lever
Decibels are the scale used for measuring the volume of sounds.
the unit is m3 (cubic metre)
It depends what you're measuring. For example, if you're measuring distance, the SI unit used is the metre.
a unit for measuring cloth
a gram