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Week 3 Worksheet

     
1 What is Ohm's Law?  
2 Why can't you use a 120 v bulb on a 12 v circuit?  
3 What are the units of electical POWER and WORK? Give an example.  
4 Calculate the amperage in slide 10 12 VDC, 11 W
12 VDC, 50 W
120 VAC, 11 W
120 VAC, 30 W
120 VAC, 50 W
5 How do you calculate the voltage across 3 batteries in series?

 

 

 

6 What will fry the multi-meter?

 

 

 

7 Give an example of the demand for a rural house - with units.
List 5 appliances and their demand.
Sum to get the total

1.

2.

3.

4.

5.

Total

8 What was the rating (in watts) for the panel that we tested? How big was it?  
9 Draw a amps vs. volts curve for a PV panel and show where you find the maximum power.

 

 

 

 

 

10 Why do you need a PV controller?