1 Watt = _.

Explanation

Watts (W) is the unit of measurement for power, which is the rate at which energy is transferred or transformed. Volts (V) is the amount of work required to move a unit charge between two points. Amps (A) are the unit of measurement for electric current, which is the amount of charge flowing through a conductor per unit of time. Therefore, the formula for power (P) is P = V x I, where V is in volts and I is in amps. To convert volts and amps to watts, we multiply them together. (W = V x A). Therefore, the correct expression for 1 watt is 1 VA, because 1 volt multiplied by 1 amp equals 1 watt. So the correct option is A ( 1 VA ).