OHMS LAW VIDEO http www youtube comwatch vE

OHMS LAW

VIDEO http: //www. youtube. com/watch? v=E 27 XDNf 2 cxc

What is ohms law? Ohm’s Law explains the relationship between voltage (V), current (I) and resistance (R) Used by electricians, automotive technicians, stereo installers

VOLTAGE (V) It is the push or pressure behind current flow through a circuit, and is measured in (V) volts.

CURRENT Current refers to the quantity/volume of electrical flow. Measured in Amps (A)

RESISTANCE Resistance to the flow of the current. Measured in Ohms

Chart

General Rule. 1. Assuming the resistance does not change: As voltage increases, current increases. as voltage decreases, current decreases. 2. Assuming the voltage does not change: As resistance increases, current decreases. As resistance decreases, current increases.

RECAP!! What is Voltage? What is Current? What is Resistance?

Part 2 http: //www. youtube. com/watch? v=e. Z 9 Xk 0 Lln 5 Y&feature=related Stop at 1 Min mark

How do we used Ohms law

V = I x R I = V R R = V I

How do calculate? Battery voltage is 12 V Current is Amp ? Resistance 2 Ohm

How to calculate? Voltage is 12 V Current is 4 Amps Resistance Ohms ?

What can we use to measure? Multi meters/ DVOM

Resistors Why do we need resistors To decrease the amount of voltage applied to a component The value of the resistor is marked on the body using coloured rings

Resistors

Resistor color chart

Part 3 http: //www. youtube. com/watch? v=YB_JCUw 9 S o. U&feature=related

Load What is a load It is a any electric load on a circuit that does work. Example: Power windows, light bulbs, motors.

Different types of circuit Series circuit : One pathway for current to flow. Example: Old Christmas lights

Parallel Circuit More then one path way for current to flow. Used in most electrical vehicle circuits.

Series and Parallel Circuits 12

Parallel resistance circuit

What it looks like

1997 Headlight circuit

RECAP!! What is Voltage? What is Current? What is Resistance? What are wiring diagrams? What are the different circuits and there characteristics?

QUIZ