electrical calculations. ohm’s law describes the relationship between current, resistance, and...
TRANSCRIPT
![Page 1: Electrical Calculations. Ohm’s law describes the relationship between current, resistance, and voltage. As voltage increase, current increases As resistance](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bfe21a28abf838cb4923/html5/thumbnails/1.jpg)
Electrical Calculations
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Ohm’s law describes the relationship between current, resistance, and voltage.
As voltage
increase,
current
increases
As resistance decreases, current
increases
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Electric power is the rate at which electrical energy is changed into other
forms of energy
Power is measured in WATTS
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Electrical energy is electric power multiplied by time. It is usually expressed in kilowatt-hours.
A KILOWATT is 1000 watts!
Find these at your house! They show the power company how much
electrical energy you use.
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Self-Check
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Question 1
As resistance goes up, what happens to the current?a. The current goes up.b. The current goes down.c. The current stays the same.d. The current disappears.
![Page 7: Electrical Calculations. Ohm’s law describes the relationship between current, resistance, and voltage. As voltage increase, current increases As resistance](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bfe21a28abf838cb4923/html5/thumbnails/7.jpg)
Question 1
As resistance goes up, what happens to the current?a. The current goes up.b. The current goes down.c. The current stays the same.d. The current disappears.
![Page 8: Electrical Calculations. Ohm’s law describes the relationship between current, resistance, and voltage. As voltage increase, current increases As resistance](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bfe21a28abf838cb4923/html5/thumbnails/8.jpg)
Question 2
What is the rate at which electrical energy is changed into other forms of energy?a. electric powerb. voltagec. electrical energyd. amps
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Question 2
What is the rate at which electrical energy is changed into other forms of energy?a. electric powerb. voltagec. electrical energyd. amps
![Page 10: Electrical Calculations. Ohm’s law describes the relationship between current, resistance, and voltage. As voltage increase, current increases As resistance](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bfe21a28abf838cb4923/html5/thumbnails/10.jpg)
Question 3
What is the voltage if the current is 4 A and the resistance is 10 Ω?a. 4 Vb. 40 Rc. 10 Vd. 40 V
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Question 3
What is the voltage if the current is 4 A and the resistance is 10 Ω?a. 4 Vb. 40 Rc. 10 Vd. 40 V
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Question 4
How much electrical energy does a 75 W light bulb use if it is on for 4 hours?a. 150 kWhb. 150 Wc. 300 kWhd. 300 W
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Question 4
How much electrical energy does a 75 W light bulb use if it is on for 4 hours?a. 150 kWhb. 150 Wc. 300 kWhd. 300 W
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Question 5
In the formula P = V X I, what does the I stand for?a. currentb. intensityc. voltaged. resistance