1. ELECTRICITY IN AGRICULTURE

2. ELECTRICITY PLUS IMAGINATION

3. OBJECTIVES Identify the importance of electricity in agriculture on a hand out with 90% accuracy. Define key terms on a handout with 80% accuracy. Differentiate between an AC and DC circuit with 100% accuracy on a handout. Compare insulators and conductors on a handout with 100% accuracy. Calculate cost of electricity in a real world environment with 80% accuracy.

4. REASONS TO LEARN Why is electricity important your life? Why is electricity important in Agriculture? Why do we need to understand how electricity works?

5. QUESTIONS TO ANSWER What are some terms associated with electricity? What are some things that you use electricity for? What are is the difference in AC and DC electricity? What are insulators and conductors?

6. TYPES OF CURRENT Electric Current- is the flow of electrons in a conductor

7. ADVANTAGES AND DISADVANTAGES AC Electricity Standard use More power Travels Farther DC Electricity Batteries Safer Portable

8. VOCABULARY Electricity- a fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons. Electric Circuits- a continuous conductor that provides a path for the flow of electrons away from and back to an electrical source.

9. MORE VOCABULARY Watts-Measuring unit of power. Amperage- the amount of electric current flowing past a point in a circuit every second. Voltage- potential force in an electrical system; electrical pressure. Ohm-Unit of electric resistance. Voltage Drop- decrease in voltage of a long span of wire because of increased resistance.

10. CONDUCTOR VS. INSULATOR Conductor- Material that have little resistance of current Insulator- Material that has strong resistance of current

11. EQUATIONS Watts= Volts X Amps Volts= Watts/Amps Amps= Watts/Volts Kilowatt= Watts/1000 Electric Cost= Kilowatt hrs. X Cost of service

12. READING AN ELECTRIC METER

13. FIGURING TOTAL ELECTRIC COST Original Reading is 35947 Next month reading is 42058 Cost is $0.0175 per kilowatt hour What is the Cost of electricity for that month? Solution 42058-35947= 6111 kW h 6111 kW-h X $.0175= $106.94

14. FIGURE ELECTRIC BILL 5 amp fan operating on a 240V circuit. It operates 12 hours a day for a week. The cost of electricity is $0.02 per kilowatt hour. How Much does this fan cost for a four week month?

15. SOLUTION 5A X 240V= 1200W 1200W / 1000= 1.2 kW 1.2 kW X 12 hrs= 14.4 kW hrs per day 14.4 kW hrs X 7 days= 100.8 kW hrs per week 100.8 kW hrs X 4 weeks= 403.2 kW hrs for month 403.2 kW hrs X $0.02= $8.064 for the month