Explore BrainMass

Explore BrainMass

    Transformer

    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!

    Problem 34.45
    Electricity is distributed from electrical substations to neighborhoods at 1.5×104 . This is a 60 oscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120 that is delivered to your house.
    Part A
    How many turns does the primary coil on the transformer have if the secondary coil has 110 turns?
    Express your answer using two significant figures.
    ANSWER: = Answer not displayed turns

    Part B
    No energy is lost in an ideal transformer, so the output power from the secondary coil equals the input power to the primary coil. Suppose a neighborhood transformer delivers 300 at 120 . What is the current in the 1.5×104 line from the substation?
    Express your answer using two significant figures.
    ANSWER: = Answer not displayed

    © BrainMass Inc. brainmass.com October 2, 2022, 12:41 pm ad1c9bdddf
    https://brainmass.com/physics/power/turns-transformer-current-line-substation-384873

    Attachments

    SOLUTION This solution is FREE courtesy of BrainMass!

    Please see attached for the solution to the following problems.

    Problem 34.45
    Electricity is distributed from electrical substations to neighborhoods at 1.5×104 . This is a 60 oscillating (AC) voltage. Neighborhood transformers, seen on utility poles, step this voltage down to the 120 that is delivered to your house.
    Part A
    How many turns does the primary coil on the transformer have if the secondary coil has 110 turns?
    Express your answer using two significant figures.
    ANSWER: = Answer not displayed turns

    Part B
    No energy is lost in an ideal transformer, so the output power from the secondary coil equals the input power to the primary coil. Suppose a neighborhood transformer delivers 300 at 120 . What is the current in the 1.5×104 line from the substation?
    Express your answer using two significant figures.
    ANSWER: = Answer not displayed

    Solution:
    Part A: We'll use the voltage ratio and the turns ratio to get the number of turns of the primary coil:

    Part B: The power at the primary equals the power in the secondary. So we have:

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

    © BrainMass Inc. brainmass.com October 2, 2022, 12:41 pm ad1c9bdddf>
    https://brainmass.com/physics/power/turns-transformer-current-line-substation-384873

    Attachments

    ADVERTISEMENT