Voltage or Potential Energy?

The standard unit for voltage is a volt. Voltage can be measured by a voltmeter. Voltage is what makes the electrons move. The voltage between two points is equal to the work done per unit of charge.

Conductors

In a conductor electric current can flow freely. Metals such as copper typify conductors. Most metals are good electric conductors, most non-metals are not. Metals are classified as conductors because their outer electrons aren’t tightly bound.

Insulators

Most non-metals aren’t good insulators. Most solid materials are classified as insulators because they offer a very large resistance to the electric current.

What is a battery?

A battery is a source of potential  energy. A battery is a device that stores the energy in electric charges in opposite ends of the terminal. A battery has three parts, an anode witch holds the negative charges, A cathode witch holds the positive charges and the electrolyte. The chemical reactions in the battery cause a build up of electrons at the anode. The electrochemical cells convert chemical energy into electric energy. Connecting electrochemical cells together creates a battery. The battery provides energy by pushing negative charges through the conductor.

What is Resistance?

Electrical resistance is the property of a substance that slows down the movement of electrons and converts chemical energy into other forms of energy.

What is a Resistor?

A resistor is a competent in a circuit that has a specific resistance. These are used to control current or voltage to suit the needs of other electric devices In the circuit.

Ohm’s Law

Ohm’s law is a mathematical equation that shows how voltage, current and resistance are related.

Current- The movement of the electrons through the conductor.

Voltage- Is what makes the electrons move.

Resistance- Works against and attempts to slow down the movement

Good Conductors have low resistance which means that electrons flow threw them easily.

Poor Conductors have high resistance which means electrons are slowed down.

Voltage=current x resistance

Resistance=voltage / current

Current=voltage / resistance

Volts (V), Amps (I), Ohms (R)

What you need for charges to move through a circuit.

1-There must be a capable source of energy.

2-There must be a conductor so charges have the ability to move.

3-You must have a reliable device (load) ex, speaker ,heater, motor.

4-Lastly a switch, something that can control the movement of the charges.

An electric current circuit can be measured in units called amperes (A)

These currents are produced when coulombs of charged particles move past a certain point.

Electric current can be measured with a ammeter