## What is the symbol for DC power?

DC Current Represented by capital V with three hyphens and a straight line on top, the symbol stands for current. You should use it when you are measuring DC current.

**What is the symbol for AC source?**

Whereas the familiar battery symbol is used as a generic symbol for any DC voltage source, the circle with the wavy line inside is the generic symbol for any AC voltage source.

### How do I tell AC or DC?

One way to determine if you have an AC-DC power supply or a DC-DC model is to look at the device itself. Often, the input and output information will appear somewhere on the surface. If the input is AC, you have an AC-DC power supply, and you have a DC-DC model if the input and output both are DC.

**What is the symbol for AC on a multimeter?**

A wavy line indicates AC. A straight line or dash shows DC. These abbreviations and symbols are often found on multimeters.

## What is the current symbol?

symbol I

Current is usually denoted by the symbol I. Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR.

**Is my home AC or DC?**

AC – Alternating Current

When you plug things into the outlet in your house, you don’t get DC. Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time).

### What is the symbol for voltage?

What is Ohm’s Law?

Quantity | Ohm’s Law symbol | Unit of measure (abbreviation) |
---|---|---|

Voltage | E | Volt (V) |

Current | I | Ampere, amp (A) |

Resistance | R | Ohm (Ω) |

**How do you type the DC voltage symbol?**

Unicode Character “⎓” (U+2393)

## What is the AC voltage symbol?

V

What are voltage, current, and resistance?

Variable | Symbol | Symbol |
---|---|---|

Voltage | V | V |

Current | I | A |

Resistance | R | Ω |

**Is a light switch AC or DC?**

The first thing you need to know is that light switches are rated based on the electrical current type. For example, the two most common types of lighting switches are DC (direct current) and AC (alternating current).

### What is DC on a multimeter?

Set the multimeter to “2V” in the DC (direct current) range. Almost all portable electronics use direct current), not alternating current. Connect the black probe to the battery’s ground or ‘-‘ and the red probe to power or ‘+’.