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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?
 

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.
 

Another one !! It's 11.125 amps.

Please send prize directly to my home address.
 

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

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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