## kWh – Cost of Electric Energy

The unit of measurement used in the electricity bill is the kWh, however in the electrical or electronic products that we buy in stores, the unit of electricity consumption is given in watts or kilowatts.

•
128
Shares
• 128
•
•
•
•
•
•

## Push – Pull Amplifier – Push – Pull Amplifier Operation

Push – Pull Amplifier

A Push – Pull amplifier is called that way, because it uses 2 groups of transistors and only one works at a time. One group pushes in one direction while the other pulls in another direction. Each group is responsible for amplifying a single phase of the input wave.

•
128
Shares
• 128
•
•
•
•
•
•

## Series RC circuit connected to an AC voltage

The series RC circuit.

In a series RC circuit, the current through the resistor and the capacitor is the same. The voltage VS is equal to the phasor addition of the voltage drop across the resistor (Vr) and the voltage drop across the capacitor (Vc).

•
128
Shares
• 128
•
•
•
•
•
•

## Air core inductor inductance calculation

Air core inductor coil inductance calculation

There are some occasions when we have an air core inductor, and we don’t know what its value is. There is an easy way to obtain the air core inductor coil inductance if you have the external measurements of this component.

•
128
Shares
• 128
•
•
•
•
•
•

## Power Transformer usage

The Electric Power Transformer usage – The Transformer Distribution System

Electric power transformers are static electrical machines that allows modification of the voltage and the current values, so they can take the appropriate one (value) to carry and distribute the electric energy.

•
128
Shares
• 128
•
•
•
•
•
•

## Alternating Current (AC)

What is Alternating Current?

The difference between an alternating current and a continuous current is that the continuous current flows only on one direction. The alternating current circulates first in one direction and then on the opposite one, repeating this process continuously.

•
128
Shares
• 128
•
•
•
•
•
•