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  1. #1
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    ELECTRICAL AND ELECTRONICS Instrumentation

    1. The current passing through a 10 ohm resistance is given by I=5+5√3 cos314t. The current is measured by a PMMC meter. What is the measured value?

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  2. #2
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    Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Stupid question or trick question. Is there a rectifier in your meter? Does it have an AC range? If not, the answer is 5. If so, the answer is 11.1.



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  3. #3
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    Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Another one !! It's 11.125 amps.

    Please send prize directly to my home address.



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  4. #4
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    Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Hi,

    5 + 0Aavg = 5A
    -------------
    --Akanimo.



  5. #5
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    Re: ELECTRICAL AND ELECTRONICS Instrumentation

    Interesting. So you're saying that a PMMC only measures Avg current? Good to know. Learn new stuff everyday.



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  6. #6
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    Re: ELECTRICAL AND ELECTRONICS Instrumentation

    PMMC = permanent magnet moving coil - meter, I think all moving coil meters give an average reading... moving iron have expanded scales as they are not linear with coil current ...



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