Electric Current Fundamentals

Electric Current Measurements

  • Volts (V)

    • Measures the pressure or force of an electric current.

    • Essential for understanding the driving potential behind the flow of electricity.

  • Amperes (A)

    • Measures the strength of an electric current.

    • Represents the flow rate of electric charge.

  • Milliamperes (mA)

    • Equal to one one-thousandth of an ampere (1mA=0.001A1 mA = 0.001 A).

    • Commonly used in beauty treatments and devices (e.g., MAD lamps) because they deliver a safe and low-level current for skin treatments.

    • High amperage (in full amperes) can be dangerous; could cause harm or electric shock.

  • Ohms (Ω)

    • Measures the resistance of an electric current.

    • Although not typically necessary in beauty modalities, it's important to understand the concept of resistance in an electrical circuit.

  • Watts (W)

    • Measures the amount of electric energy used per second (1W=1J/s1 W = 1 J/s).

    • Commonly referenced in light bulbs to denote energy use.

  • Kilowatts (kW)

    • Equal to one thousand watts (1kW=1000W1 kW = 1000 W).

    • Utilized for larger applications, such as home or building energy consumption (e.g., a 5 kW appliance uses 5000 watts).

Key Takeaways

  • Understanding these units of measurement is critical for safely using electrical equipment in beauty treatments.

  • The readings in milliamperes ensure safety compared to higher amperage, preventing potential harm during applications.

Review and Preparation

  • The next class will continue with this chapter.

  • Important to read and complete chapter activities before the test on Thursday for better comprehension.