A digital multimeter is set up as shown in...

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Question 1 of 2066636eed28f7522a1c51d4c3

A digital multimeter is set up as shown in the illustration to test an individual element of a three- phase immersion heater. The elements are connected across terminals 1 and 4, 2 and 5, and 3 and 6 as shown. The reading across terminals 1 and 4 is 32 ohms. The reading across terminals 2 and 5 is 32 ohms. The reading across terminals 3 and 6 as shown is "OL" ohms. What condition is indicated? Illustration EL-0216

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Question 1 of 20

66636eed28f7522a1c51d4c3

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🔍 Key Concepts

• Behavior of a digital multimeter on the ohms (Ω) scale, especially what an "OL" (overload/open loop) reading indicates • Difference between an open circuit (broken element) and a short circuit (very low resistance) when testing a heater element • What a normal resistance value for a heating element looks like when measured across its two terminals

💭 Think About

• If two identical heater elements both read 32 Ω, what does that suggest about their condition? Would a short circuit have a higher, lower, or near‑zero resistance? • When the meter shows "OL" on the resistance scale between two terminals, is the meter seeing very high resistance or very low resistance? What physical condition in a heating element would cause that? • Think about current flow: in which condition (open vs short) would current be unable to pass through the element at all?

✅ Before You Answer

• Confirm what your meter’s "OL" indication means on the resistance range (open / out of range vs short). • Compare the measured 32 Ω readings to what you’d expect for a healthy heater element of that size: similar values usually indicate normal operation. • Decide whether an open‑circuited element should show infinite/very high resistance or near‑zero resistance on the ohmmeter, and match that to the readings given.

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