PPT4: Ohm's law, Power, and Energy

• “At steady-state condition, the voltage across a resistor is directly proportional

  to the current flowing through it with the temperature remaining constant.”

  Ohm's law
• it is defined as the rate at which electrical energy is expended or used up.

  Electric power
• it is the capacity to do work.

  Energy
• it is the rate at which power is consumed over a specified period in of time.

  Electric energy consumption
• it is a collection of electrical elements interconnected in some specific way

  through which electric current flows or it is intended to flow.

  Electric Circuit
• It is an uninterrupted path that allows a continuous flow of current through an electrical circuit. In a building, the circuit is closed when a switch is turned on.

  Closed circuit
• If the path of current flow is interrupted such as if the switch in a circuit is open

  (turned off)

  Open circuit
• If an inadvertent shortcut develops in a circuit that permits current flow through an unintentional path

  Short circuit
• it is a combinational circuit when simplified will result into a series circuit.

  Series-parallel circuit
• it is a combinational circuit when simplified will result into a parallel circuit.

  Parallel-series circuit
• The same current flows through all the resistances.

  Series circuit
• There will be voltage drop across each resistance.

  Series circuit
• The sum of the voltage drops is equal to the

  applied voltage.

  Series circuit
• The total current of the circuit is equal to the sum of branch currents.

  parallel circuits
• There are as many current paths as the number of branches.

  parallel circuits
• The voltage across each resistance of the circuit combination is the same.

  parallel circuits