Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  A correctly adjusted single phase, 200 V indu... Start Learning for Free
A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.
    Correct answer is between '-3,-2.95'. Can you explain this answer?
    Verified Answer
    A correctly adjusted single phase, 200 V induction watt meter has a me...
    Energy consumed in one minuit

    Revolution made in one minute
    = 0.027 × 600 = 16 RPM
    Speed of disc = 16 RPM
    When lag adjustment is altered
    Steady speed N = KVI sin (Δ – ϕ)
    If the lad adjustment is correctly done Δ = 90°
    Under this condition, steady speed
    N = KVI sin (90° - ϕ) = KVI cos ϕ
    ∴ Error introduce because of incorrect lag adjustment 

    We have Δ = 76°
    View all questions of this test
    Most Upvoted Answer
    A correctly adjusted single phase, 200 V induction watt meter has a me...
    First, we need to calculate the true power (P) and apparent power (S) using the given current (I) and power factor (PF):

    P = VI cos(θ) = 200 V x 8 A x 0.8 = 1280 W
    S = VI = 200 V x 8 A = 1600 VA

    Next, we need to calculate the phase angle (θ) between the voltage coil flux and the applied voltage, given that the lag adjust has been altered to 76 degrees:

    θ = 76 - 90 = -14 degrees (since the voltage coil flux lags the voltage by 90 degrees by convention)

    Now we can calculate the apparent power based on the altered phase angle:

    S' = VI cos(θ) = 200 V x 8 A x cos(-14) = 1669 VA

    The error introduced by the altered phase angle can be calculated as the percentage difference between the two apparent powers:

    error = (S' - S)/S x 100% = (1669 - 1600)/1600 x 100% = 4.3%

    Therefore, the error introduced at a power factor of 0.8 lagging is 4.3%.
    Explore Courses for Electrical Engineering (EE) exam

    Top Courses for Electrical Engineering (EE)

    A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer?
    Question Description
    A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer?.
    Solutions for A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
    Here you can find the meaning of A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer?, a detailed solution for A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? has been provided alongside types of A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A correctly adjusted single phase, 200 V induction watt meter has a meter constant of 600 revolutions per kWh. Calculate the error introduced at unity PF. (in %), for a current of 8 A at a power factor of 0.8 lagging if the lag adjusted is altered so that the phase angle between voltage coil flux and applied the voltage of 76°.Correct answer is between '-3,-2.95'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
    Explore Courses for Electrical Engineering (EE) exam

    Top Courses for Electrical Engineering (EE)

    Explore Courses
    Signup for Free!
    Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
    10M+ students study on EduRev