CURRENT AFFAIRS

Detailed explanation-1: -Voltage is electric potential energy per unit charge, measured in joules per coulomb ( = volts). It is often referred to as “electric potential", which then must be distinguished from electric potential energy by noting that the “potential” is a “per-unit-charge” quantity.

Detailed explanation-2: -Voltage is measured in volts (V) where 1 volt is 1 joule of energy per coulomb. Therefore, if something has a voltage of 10 volts it must have 10 joules of energy transferred per unit of charge passed. (This is the same as saying 10 joules per coulomb, since 1 coulomb is 1 unit of charge passed.)

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 electric potential energy of any given charge or system of changes is termed as the total work done by an external agent in bringing the charge or the system of charges from infinity to the present configuration without undergoing any acceleration.

Detailed explanation-5: -Electric potential of a point charge is V=kQ/r V = k Q / r . Electric potential is a scalar, and electric field is a vector. Addition of voltages as numbers gives the voltage due to a combination of point charges, whereas addition of individual fields as vectors gives the total electric field.