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.
Related Questions
Q104:What is the combined effect of inductive reactance, capacitive reactance, and re... Q295:What can cause uneven wear of the commutator surface on a direct current generat... Q315:As shown in the illustration, what type of starter is illustrated? Illustration ... Q376:Where is the power necessary to energize the howler "relay" coil at the engine r... Q159:If the approximate voltage to be measured in an electric circuit is not known, w...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources