Before measuring an unknown resistance with...

Before measuring an unknown resistance with...

Question 1 of 270705eccefa3bacbc34ba4d47f5b

Before measuring an unknown resistance with an analog multimeter set up as an ohmmeter, what should you do?

Question 1 of 27070

Q

Before measuring an unknown resistance with an analog multimeter set up as an ohmmeter, what should you do?

🔍 Key Concepts

• Analog ohmmeter operation and why it uses an internal battery • The meaning of the resistance scale markings: 0 Ω (short) vs ∞ (infinity/open circuit) • Why ohmmeters need zero adjustment before accurate measurements

💭 Think About

• When there is no resistance connected between the test leads, what should the ohmmeter display on its resistance scale? • If the meter’s internal battery voltage is slightly off, what simple step can you take on the meter so that subsequent resistance readings are still accurate? • On an analog ohmmeter, which part of the scale (left, middle, or right) is normally used to represent zero ohms?

✅ Before You Answer

• Look closely at a typical analog ohmmeter: verify where 0 Ω and ∞ (infinity) are located on the scale • Confirm which choice involves physically using the test leads together before measuring an unknown resistance • Check which step explicitly mentions calibration/adjustment of the ohms scale before taking a reading