**Contents**show

So if 1 watt = 1 joule per second, it therefore follows that: 1 Joule of energy = 1 watt over one unit of time, that is: Work equals Power multiplied by Time, (V*I*t joules). So electrical energy (the work done) is obtained by multiplying power by the time in seconds that the charge (in the form of a current) flows.

## What is the unit for electrical energy?

Electricity is measured in **Watts** and kilowatts

Electricity is measured in units of power called Watts, named to honor James Watt, the inventor of the steam engine. A Watt is the unit of electrical power equal to one ampere under the pressure of one volt. One Watt is a small amount of power.

## How do you find the unit of energy?

When the Watt is multiplied by a unit of time, an energy unit is formed as follows: **1 Ws = 1 J**. The use of the kilowatt-hour is more common: 1 kWh = 3600 kWs = 3.6 MJ. Besides the second [s] and the hour [h], the day [d] and the year [yr] are also used, with 1 yr = 365.2425 d = 31,556,952 s.

## What is the efficiency formula?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula **r=P/C**, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.

## What is work formula?

**W = F × d**. The dimension of work is the same as that of energy. It is given as, [ML²T^-²]. Unit of Work: The SI unit for the work is joule (J), and it is defined as the work done by a force of 1 Newton in moving an object for a distance of one unit meter in the direction of the force.

## What is the cost of 1 unit?

A unit cost is **a total expenditure incurred by a company to produce, store, and sell one unit of a particular product or service**. Unit costs are synonymous with cost of goods sold (COGS). This accounting measure includes all of the fixed and variable costs associated with the production of a good or service.

## What are 2 types of electricity?

Current electricity is a constant flow of electrons. There are two kinds of current electricity: **direct current (DC) and alternating current (AC)**.

## What is the best source of electrical energy?

**Hydroelectric power**, using the potential energy of rivers, is by far the best-established means of electricity generation from renewable sources. It may also be large-scale – nine of the ten largest power plants in the world are hydro, using dams on rivers.

## What is electricity and its type?

There are two main types of electricity, **Static Electricity**, generated by rubbing two or more objects causing to build up friction, Current Electricity, generated by the flow of electrical charge through a conductor across an electrical field.