You are right It is a measure unit that has to do with a force per unit area:Petus. I copied the first sentence from Wikipedia which I commend to you. The pascal (symbol: Pa) is the SI derived unit of pressure, stress, Young's modulus and tensile strength. It is a measure of force per unit area, defined as one newton per square metre. As far as I know it has nothing to do with electricity, but rather more to do with measuring air pressure as in meteorology or in engineering applications.