From dbca7bc4e914370facd2f5cbea4277e7a1efcb30 Mon Sep 17 00:00:00 2001 From: altaf-creator Date: Mon, 21 Aug 2023 21:41:22 +0700 Subject: i added stuff. --- lessons/fisika/static-electricity/coulomb.html | 112 +++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 lessons/fisika/static-electricity/coulomb.html (limited to 'lessons/fisika/static-electricity/coulomb.html') diff --git a/lessons/fisika/static-electricity/coulomb.html b/lessons/fisika/static-electricity/coulomb.html new file mode 100644 index 0000000..65864b8 --- /dev/null +++ b/lessons/fisika/static-electricity/coulomb.html @@ -0,0 +1,112 @@ + + + + + + + + + + Al Azhar 9th Grade Lesson Notes + + + + + + + + +
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❓ Unchecked by Professionals
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Definition

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Coulomb's law is a law that explains the releationship between 2 or more electrical charges.

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This law states that: "The magnitude, or absolute value, of the attractive or repulsive electrostatic force between two point charges is directly proportional to the product of the magnitudes of their charges and inversely proportional to the squared distance between them."[1]

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Formula

+ F = k Q1 × Q2⁄r2 +

+ where,
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  • F = Force (Newton)
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  • r = Distance (Metres)
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  • Q1 = Charge 1 (Coulomb)
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  • Q2 = Charge 2 (Coulomb)
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  • K = Constant = 9 × 109 Nm2 / C2
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Unit Conversions (for Coulomb)

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  1. n mC (milliCoulomb) = n * 10-3 C
    2. +
  2. n MC (MicroCoulomb) = n * 10-6 C
    3. +
  3. n nC (nanoCoulomb) = n * 10-9 C
    4. +
  4. n Å (Ångström) = n * 1010 C
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Example

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Given:

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+ r = 30 cm = 0,3 m = 3 × 10-1 m
+ Q1 = 2 MC = 2 × 10-6
+ Q2 = 3 MC = 3 × 10-6
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Solution:

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+ F = k Q1 × Q2⁄r2
+ + F = 9 × 1092 × 10-6 ‧ 3 × 10-6⁄(3 × 10-1)2 = 9 × 109 ‧ 2 × 10-6 ‧ 3 × 10-6⁄9 × 10-2
+ + = 109 ‧ 2 × 10-6 ‧ 3 × 10-6⁄10-2 = 10-3 × 6⁄10-2
+ + = 6 × 10-1 +

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References

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  1. Coulomb, 1785. "Second mémoire sur l'électricité et le magnétisme"
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