To report a campus emergency
Tell the attending instructor
If not available or practical call 4440 and explain the situation to campus security
To report a medical emergency or fire
Tell the attending instructor
If very serious do not hesitate to call 9911
9- 911and stay on the line
First step to dealing with a fire
Insure those in the shop are immediately aware of the fire
Additional Fire Safety
Do not hesitate to evacuate the building
If out of control make sure 9-911 is called
(from a safe location)
Before using any new tool or piece of equipment
Read the instructions and service procedures
Ask questions
DO NOT use any piece of equipment at Linn-Benton Community College until you have been checked out by an instructor
Before testing or diagnosing any unfamiliar machine or system
Locate and read manufacturer procedures
Pay special attention to any precautions
Ask Questions before proceeding
For Electrical Current to Flow:
There must be a difference in electrical potential or pressure called...VOLTAGE
A conductor for the amps to move through
and Resistance to control the flow of electrons
Ohms Law E=IxR
Voltage (Electromotive-force) is used up…
to push Amperage (the Intensity of the current)…
through a Resistance
Increasing resistance will lower amp flow
How will Increasing voltage affect the amp flow?
Increase
Ohms Law E=IxR
1 volt can push 1 amp through 1 of resistance
12 volts can push 12 amps through 1 of resistance
12 volts can push 1 amp through 12 of resistance
Ohms Law E=IxR
As Voltage increases the current will…
…increase As Resistance increases the current will…
…decrease As Resistance decreases the current will…
…increase
Amp flow is determined by the TOTAL resistance
All amps flow through every resistor (when in series)
As amps flow through a resistor Voltage (pressure) is used up……(voltage drop)
The sum of the individual voltage drops equal the source voltage
What is the total resistance?
6 ohms
How many amps flow through R1?
2 amps
What is the Volt drop across R1?
4 volt
How many volts at the connection between R1 & R2
8 volt
Equal voltage will drop across each resistor in a parallel circuit
Amperage flow will vary for each resistor
The sum of the amp flow through each resistor will equal the total amp flow out of the battery
Do the last page of the Simple Ohms Law worksheet
When calculating total resistance you can use this formula