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ELECTRICAL AND ELECTRONICS Instrumentation

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rajasekharnbkrist

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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?
 

barry

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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.
 

kripacharya

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Another one !! It's 11.125 amps.

Please send prize directly to my home address.
 

kripacharya

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

Easy peasy

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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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