# Basic Concepts

• ## Why is the Standard Voltage in the US 120V/240V and 230V in the EU?

Why is the Standard Voltage in US homes 120V & 240V but 230V in the EU? Why Not Other Higher or Lower Levels of Voltage? The standard household voltage level…

• ## Difference Between 120V and 240V/230V AC Power Supply

What is the Difference Between 120V, 230V and 240V AC Power? We all know that the common voltage levels available in the US for household applications are 120V and 240V…

• ## Why is the Standard Frequency 60 Hz in the US & 50 Hz in the EU?

Why is the Standard Frequency for Supply in the EU 50 Hz, But 60 Hz in the US?  And Why Were Other Higher or Lower Frequencies Not Chosen? The power…

• ## Advantages & Disadvantages of 50 Hz and 60 Hz Frequency Power Supply

Advantages and Disadvantages of 60 Hz (US) and 50 Hz (EU) Frequency We know that the frequency of the supply voltage in North American countries, including Canada and the US,…

• ## Difference Between 50 Hz and 60 Hz Frequency System

What is the Difference Between 50-Hz and 60-Hz Frequency System? The electricity that we use in our homes is produced and supplied by huge generators inside the power generation stations.…

• ## Difference Between Socket, Outlet and Receptacle

What is the Main Difference Between Outlet, Socket and Receptacle? The terms “socket” and “outlet” are often used interchangeably, but they have different meanings in electrical terminology. In electrical trade…

• ## Why Do Prongs in Electrical Plugs Have Holes in Them?

Why Do Electric Plugs Have Holes in the Prongs? As you may have already noticed the two little holes near each prong’s tip in an electric plug. If not, there…

• ## What is the Main Difference Between Encoder and Decoder?

What is the Key Difference Between Decoder and Encoder? Encoder and Decoder are both combinational logic circuit that is used to convert between message signal and binary coded decimal BCD.…

• ## Difference Between Phototransistor and Photoresistor (LDR)

What is the Difference Between Photoresistor (LDR) and Phototransistor? Photoresistors and phototransistors are both a type of photosensors that allow current flow when light falls on them. However, they are…

• ## Difference Between Voltage Source and Current Source

What is the Difference Between Current Source and Voltage Source? Voltage source and current source both are electrical sources that provide electrical energy to drive an electrical load. Both of…