Math of Electricity

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Electrical Theory

Last updated 6:20 PM on 4/24/26
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12 Terms

1
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What is Ohm’s Law?
E = I × R
2
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What is the formula for current?
I = E / R
3
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What is the formula for resistance?
R = E / I
4
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What is the formula for electrical power?
P = I × E
5
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What is another formula for power using resistance?
P = I²R
6
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What is another formula for power using voltage?
P = E² / R
7
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What must you do to both sides of an equation when solving?
The same operation
8
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What is the correct order of operations?
Parentheses, exponents, multiply/divide, add/subtract
9
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What does kilo (k) mean?
1000
10
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What does milli (m) mean?
0.001
11
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What does micro (µ) mean?
0.000001
12
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What is scientific notation used for?
Very large or very small numbers