# What is DC circuit theory?

## What is DC circuit theory?

A direct current circuit is an electrical circuit that consists of any combination of constant voltage sources, constant current sources, and resistors. In this case, the circuit voltages and currents are independent of time.

### What is DC power supply circuit?

The part of equipment that converts ac into dc is called DC power supply. From the block diagram, the basic power supply is constituted by four elements viz a transformer, a rectifier, a filter, and a regulator put together. The output of the dc power supply is used to provide a constant dc voltage across the load.

#### What are the steps of DC power supply circuit?

Power Supplies

• Transformer – steps down high voltage AC mains to low voltage AC.
• Rectifier – converts AC to DC, but the DC output is varying.
• Smoothing – smooths the DC from varying greatly to a small ripple.
• Regulator – eliminates ripple by setting DC output to a fixed voltage.

How does DC power work?

In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.

What is the importance of DC circuits?

A DC circuit is necessary for DC electricity to exist. DC circuits may be in series, parallel or a combination. Understanding DC circuits is important for learning about the more complex AC circuits, like those used in the home.

## How is DC power measured?

In order to measure the DC power of a device under test (DUT), the general method is to use two DMMs to measure the DC voltage and the DC current, and multiply both results together to obtain the DC power. Figure 1. Diagram represents a typical DCV and DCI measurement configuration using two DMMs.

### What is the importance of DC power supply?

DC allows for a constant flow of current to a device. Because AC is delivered initially, power must first be converted from AC to DC. Most smaller electronic devices (such as computers) require direct current to operate with an AC-to-DC converter from wall power.

#### What are the uses of DC power supply?

DC power is widely used in low voltage applications such as charging batteries, automotive applications, aircraft applications and other low voltage, low current applications. All solar panels nowadays produce DC power.

Where is DC power used?

What uses DC power?

Uses. Direct current is used in any electronic device with a battery for a power source. It is also used to charge batteries, so rechargeable devices like laptops and cell phones come with an AC adapter that converts alternating current to direct current.