If a digital multimeter set up to measure AC...

Study

Question 1 of 2066636eed28f7522a1c51d4a9

If a digital multimeter set up to measure AC volts reads low value, but constantly changing "ghost voltages" when its leads are disconnected, what does this indicate?

Back

Question 1 of 20

66636eed28f7522a1c51d4a9

If a digital multimeter set up to measure AC volts reads low value, but constantly changing "ghost voltages" when its leads are disconnected, what does this indicate?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• High input impedance of digital multimeters on AC voltage ranges • How test leads and meter circuits can pick up induced voltages • Difference between true system voltage and a capacitive/induced "ghost" reading

💭 Think About

• Ask yourself what happens to a very sensitive AC voltmeter when its leads are just hanging in the air near energized wiring. • Consider whether the meter needs to be on its lowest range for this effect to occur, or if it can happen on any AC range with high input impedance. • Think about which of the listed conditions would definitely have to be true for you to see a small, drifting, unstable reading with the leads disconnected.

✅ Before You Answer

• Check which part of the circuit could physically behave like an antenna in this situation. • Verify whether stray electromagnetic fields alone are enough to cause a meter to read, or whether the meter’s design/input impedance plays a role. • Make sure you decide if all listed conditions must exist together, or if the observation could occur when only one of them is true.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed

Study

Question 1 of 2066636eed28f7522a1c51d4a9

If a digital multimeter set up to measure AC volts reads low value, but constantly changing "ghost voltages" when its leads are disconnected, what does this indicate?

Back

Question 1 of 20

66636eed28f7522a1c51d4a9

If a digital multimeter set up to measure AC volts reads low value, but constantly changing "ghost voltages" when its leads are disconnected, what does this indicate?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed