guys can you help me plz ....

Discussion in 'Homework Help' started by salem2200, Nov 16, 2014.

  1. salem2200

    Thread Starter New Member

    Nov 16, 2014
    2
    0
    guys can you help with this question ....

    when you are about to measure the current flowing into a motor rated at 50 A , you realize that the ammeter you are using has a rating of 1 amp maximum only ( internal resistance of the ammeter is 50 ohm ) . suggest what you would do to use the ammeter to measure the current flowing in to the motor ?

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  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    3,393
    497
    Current divider.
     
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  3. crutschow

    Expert

    Mar 14, 2008
    13,016
    3,235
    A current divider is a resistor placed in parallel with the meter so that a portion of the circuit bypasses the ammeter. So if you want to change the 1A meter into a 100A meter you would select a resistor value such that 99A flows through the parallel resistor while 1A flows through the ammeter. I will leave the calculation of that resistor value as an exercise for the OP.
     
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  4. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,347
    Hello,

    Have a look on google for "shunt resistor"

    Bertus
     
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  5. salem2200

    Thread Starter New Member

    Nov 16, 2014
    2
    0
    Thanks :) that was very useful ;)
     
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