GENERAL KNOWLEDGE

Detailed explanation-1: -Voltage is electric potential energy per unit charge, measured in joules per coulomb ( = volts). That is why voltmeter is used to measure it.

Detailed explanation-2: -Voltage is the energy per unit charge.

Detailed explanation-3: -Since voltage is the difference in electric potential energy per charge, we should measure it in terms of energy per charge – and we do. ‘Volt’ is an abbreviation for ‘joule per coulomb’, so, for example, a 1.5 volt battery provides 1.5 joule of electric potential energy to each coulomb of charge.

Detailed explanation-4: -The relationship between V and E for parallel conducting plates is E = V/d. (Note that V = VAB in magnitude.

Detailed explanation-5: -This relation is described by the formula q=CV, where q is the charge stored, C is the capacitance, and V is the voltage applied. Looking at this formula, one might ask what would happen if charge were kept constant and the capacitance were varied.