Question

Differentiate between. (1) electric potential and electric potential energy

(2) kilowatt and kilowatt hour .

Answer 1

1)Electric potential:

• It is the amount of electrical potential energy that a unitary point electric charge would have if located at any point in space, and is equal to Work done by an electric field in carrying a unit positive charge from infinity to that point.
• Or an electric potential is the amount of work needed to move a unit positive charge from a reference point to a specific point inside the field without producing any acceleration. Typically, the reference point is Earth or a point at Infinity
• Eelectric potential is a scalar quantity representing the potential energy per unit charge. It is measured in units called volts. A volt is a joule per coulomb.

Electric potential energy:

• It is a potential energy that results from conservative coulomb force and is associated with the configuration of a particular set of point charges within a defined system. An object may have electric potential energy by virtue of two key elements: its own electric charge and its relative position to other electrically charged objects.
• Electric potential energy is the energy it takes to put a charge in a given place, for example, near another charge. If the particle has to be held back (because it is attracted) then the potential energy is negative; that's because you can get energy from that particle as you move it in.

2)KiloWatt

• KW stands for kilowatt. A kilowatt is simply 1,000 watts, which is a measure of power.
• Kilowatt is a measure of how quickly something consumes (or produces) energy. This is known as “power”.

KiloWatt Hour

• A kilowatt-hour (kWh) is a measure of how much energy you’re using. It doesn’t mean the number of kilowatts (KW’s) you’re using per hour. It is simply a unit of measurement that equals the amount of energy you would use if you kept a 1,000 watt appliance running for an hour: So, if you switched on a 100 watt light bulb, it would take 10 hours to rack up 1 kWh of energy. Or a 2,000 watt appliance would use 1 kWh in just half an hour. While a 50 watt item could stay on for 20 hours before it used 1 kWh.
• KWH is a measure of energy. Energy is power expended over time. You pay for energy use, not power.