Chapter 7 Power.

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Presentation transcript:

Chapter 7 Power

Objectives After completing this chapter, you will be able to: Define power as it relates to electric circuits State the relationship of current and voltage Solve for power consumption in an electrical circuit Determine the total power consumption in a series, parallel, or series-parallel circuit

Power Power Watt Rate at which energy is delivered to a circuit Rate at which energy is dissipated by the resistance in a circuit Watt Basic unit of power

Power (cont’d.) Relationship of power, current, and voltage may be expressed as: P = I x E, where: I represents current through the circuit E represents voltage applied to the circuit

Power Application (Circuit Analysis) Total power dissipated in a series or parallel circuit:

Summary Power is the rate at which energy (heat) is dissipated in a circuit Power is measured in watts Power is directly proportional to current and voltage P = IE

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