This is a Free Service provided by Why Fund Inc. (a 501 C3 NonProfit) We thank you for your donation!


(1. Click on the course Study Set you wish to learn.) (2. If you wish you can click on "Print" and print the test page.) (3. When you want to take a test...click on anyone of the tests for that Study Set.) (4. Click on "Check Answers" and it will score your test and correct your answers.) (5. You can take all the tests as many times as you choose until you get an "A"!) (6. Automated college courses created from lecture notes, class exams, text books, reading materials from many colleges and universities.)

New

Long-Term Learning

Learn efficiently and remember over time.

Start Long-Term Learning

Get personalized study reminders at intervals optimized for better retention.
Track your progress on this set by creating a folder
Or add to an existing folder

Add this set to a folder

  • joule heat

    term for the heat generated by current when it passes through a resistance

    power

    term for the time rate of work

    house current

    term for the current furnished by electric power companies

    rate, resistance

    The effective value of an alternating current is regarded as equal to the direct current that would produce heat at the same average ___ in the same _____.

    root-mean-square (rms) value

    term for the effective value of an alternating current

    capacitance

    term for the maximum charge that a plate can hold

    capacitor

    term for a charge-storing device consisting of two conductors in near relation but not touching

    farad

    the unit of capacitance

    microfarads, picofarads

    Because they typically store only very small amounts of charge, capacitors usually have capacitances measured in _____ or _____.

    area, closer together, dielectric

    Capacitance may be changed by:
    1.) Increasing the ___ of each plate.
    2.) Bringing the plates ____ _____.
    3.) Filling the gap between the plates with _____.

    dielectric

    term that describes a material that reduces the voltage associated with a given state of charge

    dielectric constant

    term for the factor by which capacitance is multiplied when a certain material is used as a dielectric

    dielectric strength

    term for the maximum potential gradient that a material can withstand before it begins to conduct current

    self-induced emf

    If a change in magnetic flux arises from a fluctuation of current within the conducting loop itself, ______ ___ is produced.

    opposes

    An induced emf ____ the change inducing it.

    self-inductance

    term for the tendency of a loop or a coil to oppose any change in current

    inductor

    term for a circuit element with the property of self-inductance

    henry

    the unit of inductance

    primary, secondary

    If two coils in separate circuits are brought close together, changing current in the first (____) coil induces a current in the second (______) coil.

    mutual inductance

    term for the induction of an emf in one coil by another coil

    inductance

    term for the combined effect of both mutual inductance and self-inductance

    henrys

    Mutual inductance is measured in ____.

    packing density

    term for the number of turns per unit length of a coil

    series-aiding combination

    term for an arrangement in which the self-inductance in each coil is enhanced by mutual inductance because all the magnetic flux in both coils runs in the same direction

    series-opposing combination

    term for an arrangement in which self-inductance and mutual inductance have contrary effects

    transformer

    term for a device for producing a fixed increase or decrease in voltage

    transformer equation

    term for the equation that relates the voltages and numbers of turns in the primary and secondary coils of a transformer

    step-up transformer

    term for a transformer that increases voltage

    step-down transformer

    term for a transformer that decreases voltage

    ninety-five

    A well-designed transformer transmits energy from the primary circuit to the secondary circuit with above _____ percent efficiency.

    Joseph Henry

    the physicist who experimented with electricity and magnetism and discovered electromagnetic induction independently of Faraday

    Please allow access to your computer’s microphone to use Voice Recording.

    Having trouble? Click here for help.

    We can’t access your microphone!

    Click the icon above to update your browser permissions above and try again

    Example:

    Reload the page to try again!

    Reload

    Press Cmd-0 to reset your zoom

    Press Ctrl-0 to reset your zoom

    It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

    Please upgrade Flash or install Chrome
    to use Voice Recording.

    For more help, see our troubleshooting page.

    Your microphone is muted

    For help fixing this issue, see this FAQ.

    Star this term

    You can study starred terms together

    ! Voice Recording

    This is a Plus feature