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Chapter 1: Introduction and DC Circuit

Chapter 1: Introduction and DC Circuit. AZRALMUKMIN BIN AZMI. Chapter 1.2: Ohm’s Law, Power, Efficiency. AZRALMUKMIN BIN AZMI. Ohm’s Law. Georg Simon Ohm formulated the relationships among voltage, current and resistance. R = resistance ( Ω ) I = current (A)

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Chapter 1: Introduction and DC Circuit

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  1. Chapter 1:Introduction and DC Circuit AZRALMUKMIN BIN AZMI

  2. Chapter 1.2:Ohm’s Law, Power, Efficiency AZRALMUKMIN BIN AZMI

  3. Ohm’s Law • Georg Simon Ohm formulated the relationships among voltage, current and resistance. R = resistance (Ω) I = current (A) V = voltage (V)

  4. Ohm’s Law (Cont…) • The current in the circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit.

  5. Ohm’s Law (Cont…) • .

  6. Power (P) • Define = how much work (conversion of energy) can be done in a specific amount of time P = power (W) W = energy (J) t = time (s) • Unit = Watt (W)

  7. Power (P) (Cont…) so;

  8. Power (P) (Cont…) so;

  9. Power (P) (Cont…)

  10. Efficiency (𝜂) • The output energy level must always be less than the applied energy due to losses and storage within the system. Pi = Energy input Po = Energy input Plost or stored = Energy lost or stored in system

  11. Efficiency (𝜂) (Cont…)

  12. Efficiency (𝜂) (Cont…)

  13. Efficiency (𝜂) (Cont…)

  14. Efficiency (𝜂) (Cont…)

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