Electric Power

Key Questions

  • What is a kilowatt-hour?

    First of all, kilowatt-hour od kilowatt hour has many symbols: kW·h, kW h or kWh. It is a unit of energy equal to 1,000 watt-hours, or 3.6 megajoules.

    Very simple:
    If the energy is being transmitted or used at a constant power over a period of time, the total energy in kilowatt-hours is the product of the power in kilowatts and the time in hours.

    It is commonly used as a billing unit for energy delivered to consumers by electric utilities.

    Deevona · · Apr 14 2014
  • How are electric power and electrical energy related?

    Answer:

    Power is the rate of doing work.

    Explanation:

    Energy is power xx time.

    The electrical unit of power- watts or kilowatts

    For energy - kilowatts hours.

    ![http://learncbse.in](https://useruploads.socratic.org/GYog0BVRXSn6JVcLB8Jw_29591327116_5205c2180a_o.png)

    chandramohanPanakkal · 2 · Jun 7 2018
  • Why is electric power transmitted at high voltages?

    We know that electric power dissipated as a result of Joule's effect is given by,

    P = I^2Rt, thus in order to minimize the power loss, the current is supplied under very high voltage and as a consequence of law of conservation of energy, the current is reduced and substantially heat loss is also reduced.

    Aritra G. · 1 · Jun 4 2015

Questions

Electrical Energy and Current