Explore BrainMass

Explore BrainMass

    Finding Equivalent Resistance of Three Devices Connected in Parallel and Total Delivered Current

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    The total current delivered to a number of devices connected in parallel is the sum of the individual currents in each device. Circuit breakers are resettable automatic switches that protect against a dangerously large total current by "opening" to stop the current at a specified safe value. A 1500 W toaster, a 1030 W iron, and a 1000 W microwave oven are turned on in a kitchen. As the drawing shows, they are all connected through a 20 A circuit breaker to an ac voltage of 120 V.Find the equivalent resistance of the three devices and the total current delivered by the source. Answer in ohms and amps.

    © BrainMass Inc. brainmass.com November 24, 2021, 11:12 am ad1c9bdddf
    https://brainmass.com/physics/ac/14030

    Solution Preview

    Because
    Power P = V*I = V^2/R
    For toaster:
    resistance R = V^2/P = 120^2/1500 = 9.60 ohm --Answer
    current I = P/V = 1500/120 = 12.5 ...

    Solution Summary

    The solution provides a clear and concise worked method to obtaining the resistances of a microwave, iron and toaster connected in parallel with circuit breakers and ac current.

    $2.49

    ADVERTISEMENT