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- 1. ELECTRIC CURRENT ELECTRIC CURRENT-The flow of charges. Charges flow from the positive terminal to the negative terminal. There must be intermediary path for the charges (conductors). There must be potential difference between two points. This will literally push the charges from one terminal to another. The greater the potential, the greater the push.
- 2. CURRENT I= Q/t I=current (A/ampere) Q=charge (C/coulomb) t=time interval (s/second)
- 3. OHM’S LAW (Current) I= V/R I=current (A/ampere) V=voltage (V/volts) R=resistance (Ω/ohms)
- 4. VOLTAGE- electrical potential difference, electric tension or electric pressure RESISTANCE- property of a conductor due to which it opposes the flow of current through it. I= V/R I=current (A/ampere) V=voltage (V/volts) R=resistance (Ω/ohms)
- 5. Resistivity According to ohm’s law, the resistance of a metallic conductor depends on the following: 1. Length of the conducting wire- the longer the wire, the higher its resistance. 2. Cross-sectional area of the conductor- the thicker the conductor, the lower the resistance. 3. Nature of the conductor- the more free electrons there are, the lower the resistance.
- 6. RESISTANCE R=ρL/A R=resistance (Ω/ohms) ρ=resistivity of the conductor (Ω·m / ohm-meter) L=length of the wire (m) A= cross sectional area (m2)
- 7. Electric Circuit
- 8. POWER RATE OF DOING WORK THE CONVERSION OF ELECTRICAL ENERGY INTO OTHER FORMS LIKE HEAT ENERGY, CHEMICAL ENERGY, MECHANICAL ENERGY, OR LIGHT ENERGY
- 9. POWER P=QV/t P=IV P=I2 R P=V2 /R P=power (W/Watts) Q= Charge(C/Coulomb) V=voltage (V/volts) T= time interval (s/seconds) I=current (A/ampere) R=resistance (Ω/ohms)
- 10. Electric Circuit Series Circuit Parallel Circuit Combined Circuit
- 11. Series Circuit
- 12. Parallel Circuit

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