Question

Differentiate between Direct Current (DC) and Alternating Current (AC).

Hint:

{DC} is commonly used in electronic devices, while {AC} is used for household and industrial power supply.

Answer 1

Concept: Electric current is the flow of electric charge through a conductor. Based on the direction of flow, electric current is classified into Direct Current (DC) and Alternating Current (AC).
Step 1:Direct Current (DC)} Direct Current is the type of electric current that flows only in one direction. The magnitude of current usually remains constant with time. Examples:

• Electric cells
• Batteries
• Solar cells

Step 2:Alternating Current (AC)} Alternating Current is the type of electric current that changes its direction periodically. Its magnitude also varies with time. Examples:

• Household electricity supply
• Power generated in power stations

Step 3:Comparison between DC and AC} \begin{center} \begin{tabular}{|c|c|c|} \hline Feature & Direct Current (DC) & Alternating Current (AC)
\hline Direction of flow & Flows in one direction only & Changes direction periodically
\hline Magnitude & Usually constant & Varies with time
\hline Sources & Cells and batteries & Power stations and generators
\hline \end{tabular} \end{center}