Question 155Electricity & Electronics - QMED
70% to passBefore measuring an unknown resistance with an analog multimeter set up as an ohmmeter, what should you do?
Achange the meter's batteries
Badjust the meter's pointer to mid-scale
Ccenter the meter's pointer at infinity
Dshort the test leads and calibrate the meter reading to 'zero'
AI Explanation
The correct answer is D) short the test leads and calibrate the meter reading to 'zero'. Before measuring an unknown resistance with an analog multimeter, you should short the test leads and calibrate the meter reading to zero. This ensures the meter is properly zeroed and calibrated, which is crucial for accurately measuring the unknown resistance. The other options, such as changing the batteries or adjusting the pointer, do not directly address the need to calibrate the meter before taking a resistance measurement.
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