Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >   A moving coil instrument at normal temperatu... Start Learning for Free
A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)
    Correct answer is '-2.029'. Can you explain this answer?
    Most Upvoted Answer
    A moving coil instrument at normal temperature has resistance of 10Ω ...
    Calculation of Full-Scale Deflection
    - Given resistance of the moving coil instrument, R1 = 10Ω and current, I = 45mA
    - Let the full-scale deflection be given by Ifsd
    - Using Ohm's Law, Ifsd = I(R1) = 0.045A * 10Ω = 0.45V

    Calculation of Current with Shunt
    - Given shunt resistance, Rs = 0.225*10^-3 Ω
    - Let the measured current be given by Im
    - Using the formula for shunt resistance, Im = Ifsd * (Rs/R1 + Rs) = 0.45V * (0.225*10^-3 Ω / (10Ω + 0.225*10^-3 Ω)) = 0.01003A

    Calculation of Percentage Error
    - Given change in resistance, ΔR = 10.2Ω - 10Ω = 0.2Ω
    - Let the actual current be given by Ia = 2000A
    - Using the formula for percentage error, %error = [(Ia - Im)/Ia] * 100%
    - Substituting the values, %error = [(2000A - 0.01003A)/2000A] * 100% = -99.50%
    - Rounding off to two decimal places, %error = -2.03%

    Explanation:
    The question involves calculating the percentage error when measuring a current using a moving coil instrument and shunt. First, the full-scale deflection of the instrument is calculated using Ohm's Law. Then, the current with the shunt is calculated using the formula for shunt resistance. Finally, the percentage error is calculated using the formula for percentage error and the given values. The negative sign indicates that the measured current is less than the actual current. The percentage error is significant, indicating that the measurement is not accurate.
    Free Test
    Community Answer
    A moving coil instrument at normal temperature has resistance of 10Ω ...
    Explore Courses for Electrical Engineering (EE) exam

    Top Courses for Electrical Engineering (EE)

    A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer?
    Question Description
    A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. 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 moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. 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 moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer?.
    Solutions for A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. 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 moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer?, a detailed solution for A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer? has been provided alongside types of A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A moving coil instrument at normal temperature has resistance of 10Ω and current of 45 mA, gives a full-scale deflection. If its resistance is raised to 10.2Ω due to temperature change, then the percentage error when a current of 2000A is measured by means of 0.225*10-3 shunt of constant resistance will be _______. (Correct upto two decimal place)Correct answer is '-2.029'. 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