Ohms Law and Electronics Components

I = 59 mA V = 19 v R = ?

322 Ω

What electrical component is used to connect or disconnect electrical circuits?

A Switch

Switch

A mechanical device used to connect or disconnect a component or circuit.

Circuit breakers

A reusable safety switch that breaks the circuit when the current becomes too high.

I = V / R

Calculating circuit amperage

R = V / I

Calculating circuit resistance

V = IR

Calculating circuit voltage

What is the ability to store energy in an electric field called?

Capacitance

What electrical component stores energy in an electric field?

Capacitor

What electrical component is used to protect other circuit components from current overloads?

Circuit Breaker or Fuse

You have a circuit with a source voltage of 9 V DC and a circuit resistance of 360 Ω What is the Current?

I = 25 mA

You have a circuit with a source voltage of 12 V DC and a circuit resistance of 150 Ω. Solve for the unknown value using Ohm's Law.

I = 80 mA

LED

Light Emitting Diode

Fuses

Provides one time protection than must be replaced.

What electrical parameter is controlled by a potentiometer?

Resistance

What electrical component is used to oppose the flow of current in a DC circuit?

Resistor

Electromotive force Symbol

Symbol= E

Symbol for Current

Symbol= I

Symbol for Joule

Symbol= J

Symbol for Voltage

Symbol= V

Symbol for Watt

Symbol= W

Symbol for Resistance

Symbol= Ω (Greek symbol Omega) or R

one of the most important devices in electronics

The Transistor

Fuse Symbol

This symbol

What class of electronic components is capable of using a voltage or current signal to control current flow?

Transistor

Ground

Usually in electronics, ground is just a name we give to a certain point in the circuit. In a circuit with one battery (with a positive and a negative terminal), we usually refer to the negative terminal as ground.

ohms law triangle

V I R

You have a circuit with a resistance of 900 Ω and a current of 30 mA What is the Voltage?

V = 27 v

Battery

a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.

AC

alternating current

DC

direct current

Voltage

electrical potential; an electrical pressure created by the buildup of charge; causes charged particles to move

Ohm's Law

formula describing the mathematical relationship between voltage, current, and resistance; one of the most commonly used equations in all of science

A Watt is

one joule per second (J/s)

Resistance

opposition to current flow

Resistors

restrict (limit) the flow of current through it

Capacitor

temporarily store electric current. Like a very temporary storage battery. Stores energy in an electrostatic field. Blocks DC, Passes AC

Current

the flow or movement of electrons

Energy

the fundamental ability to do work

Electrical Power

the rate of electrical energy used in a circuit; calculated by multiplying current times voltage, or P = V • I

Ampere

unit of current

Watt

unit of measurement for power

Ohm

unit of resistance

Volt

unit of voltage

Power Source

used to convert the power provided from the outlet into usable power