From fa0321fbf1fb90b98cadf4300b6e48c87d8fd871 Mon Sep 17 00:00:00 2001 From: altaf-creator Date: Tue, 12 Sep 2023 13:04:58 +0700 Subject: Lock physics --- lessons/fisikaa/static-electricity/coulomb.html | 193 ++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 lessons/fisikaa/static-electricity/coulomb.html (limited to 'lessons/fisikaa/static-electricity/coulomb.html') diff --git a/lessons/fisikaa/static-electricity/coulomb.html b/lessons/fisikaa/static-electricity/coulomb.html new file mode 100644 index 0000000..e7eaebf --- /dev/null +++ b/lessons/fisikaa/static-electricity/coulomb.html @@ -0,0 +1,193 @@ + + + + + + + + + + Al Azhar 9th Grade Lesson Notes + + + + + + + + + + +
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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]

+

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
    • +
+

+

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. +
+

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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