From 7420ea9926c6cca698efa670d837a1cd753c4931 Mon Sep 17 00:00:00 2001 From: altaf-creator Date: Mon, 25 Sep 2023 06:13:47 +0700 Subject: Lockdown site --- .../fisika/static-electricity/coulomb.html | 193 +++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 lessons-locked/fisika/static-electricity/coulomb.html (limited to 'lessons-locked/fisika/static-electricity/coulomb.html') diff --git a/lessons-locked/fisika/static-electricity/coulomb.html b/lessons-locked/fisika/static-electricity/coulomb.html new file mode 100644 index 0000000..b459cb5 --- /dev/null +++ b/lessons-locked/fisika/static-electricity/coulomb.html @@ -0,0 +1,193 @@ + + + + + + + + + + Al Azhar 9th Grade Lesson Notes + + + + + + + + + + +
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❓ Unverified
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View in Indonesia
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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,
+

    +
  • F = Force (Newton)
    • +
  • r = Distance (Metres)
    • +
  • Q1 = Charge 1 (Coulomb)
    • +
  • Q2 = Charge 2 (Coulomb)
    • +
  • 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 (Alternative form: μC)
    3. +
  3. n nC (nanoCoulomb) = n * 10-9 C
    4. +
  4. n Å (Ångström) = n * 10-10 C
    5. +
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Examples & Exercises

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      +
    1. +

      Find F.

      +
      +

      Given:

      +

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

      +

      Solution:

      +

      + 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 +

      +
      2. +
      +
    2. +

      Find F.

      +
      +

      Given:

      + +

      Solution:

      + +
      3. + +
      +
    3. +

      If F = 9 × 109, Find r.

      +
      +

      Given:

      + +

      Solution:

      + +
      4. + +
    +

    References

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    1. Coulomb, 1785. "Second mémoire sur l'électricité et le magnétisme"
      2. +
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