Electrical Power

What does Electrical Power refer to?

The actual rate at which energy is provided to and consumed by an electric circuit

How is power expressed?

In Watts(Joules per second

How can power be calculated?

By multiplying the voltage(in volts)

The voltage is applied to the circuit by:

The circuit(in amperes) that flows in the circuit

What is P=IV

Power = Current x Voltage

What is this formula used for?

P=IV

Electrical Power

What does each electron flowing through a circuit or wire have?

Energy

How much energy depends on?

The voltage applied

What do electrons moving through a large voltage have?

More energy

On the other hand, what does a higher current mean?

More electrons passing by each moment

How can an equivalent rate of energy delivery be achieved?

By a smaller number of electrons each moment, with a larger amount of energy per electron, or a larger number of electrons each moment with a smaller amount of energy per electron

What is a Lower Current?

A smaller number of electrons each moment

What is a Higher Voltage?

A larger amount of energy per electron

What is a Higher Current?

A larger number of electrons each moment

What is a Lower Voltage?

A smaller amount of energy per electron

The formula not only applies to the rate of energy delivery but also to?

The rate of energy production and to the rate of energy consumption

What is the rate of energy delivery known as?

Power found in long distance power lines

What is the rate of energy production known as?

Power provided by a generating plant

What is the rate of energy consumption known as?

Power usage of energy production

Why is the word consumption a little bit misleading?

Because energy is never used up but just changes forms

A forty watt(40 W) light bulb doesn’t really use up 40 joules every second, what does it do instead?

Transforms 40 joules of electrical energy to 40 joules of light and heat energy each second