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COULOMB’S LAW

COULOMB’S LAW. Kristia Mae D. Echin. COULOMB’S LAW Helps you calculate the forces on any two electric charges. Charles Augustus Coulomb in 1785. Mathematically, F e = Kq 1 q 2 r 2. The sign of electric force determines whether the electric charges attract or repel.

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COULOMB’S LAW

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  1. COULOMB’S LAW Kristia Mae D. Echin

  2. COULOMB’S LAW Helps you calculate the forces on any two electric charges.

  3. Charles Augustus Coulomb in 1785

  4. Mathematically, Fe = Kq1q2 r2

  5. The sign of electric force determines whether the electric charges attract or repel. If Fe is negative = charges attract If Fe is positive = charges repel Each proton(+) or electron(-) only carries an absolute charge of 1.60 x 10-19 C.

  6. Suppose that two point charges, each with a charge of +1.00 Coulomb are separated by a distance of 1.00 meter. Determine the magnitude of the electrical force of repulsion between them.

  7. Fe = k • Q1 • Q2 / d2 Fe = (9.0 x 109 N•m2/C2) • (1.00 C) • (1.00 C) / (1.00 m)2 Fe= 9.0 x 109 N

  8. Two balloons are charged with an identical quantity and type of charge: -6.25 nC. They are held apart at a separation distance of 61.7 cm. Determine the magnitude of the electrical force of repulsion between them.

  9. Fe= k • Q1 • Q2 / d2 Fe= (9.0 x 109 N•m2/C2) • (6.25 x 10-9 C) • (6.25 x 10-9 C) / (0.617 m)2 Fe= 9.23 x 10-7 N

  10. M-DISCOVERY

  11. Lodestones rocks that could attract iron objects Magnesia region where lodestones are found Magnet most common way of introducing the nature of magnetism.

  12. To produce two different masses, two different electric charges and two different magnetic poles: • MASSES D

  13. ELECTRIC CHARGES Take neutrally charge object Separate charges Divide object into two pieces and separate the charge by distance D

  14. MAGNETIC FORCES Same scheme but will not work since magnetic poles refuse to be separated.

  15. end

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