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it measures the ionization of the air.

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Q: Why do the electric test pen lighted up at live only not at neutral when AC supply switched on?
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Related questions

Where is the neutral for 25kv ac single phase supply used for electric locomotives?

from ground


What is a neutral word?

neutral is a return path of supply .


What is tpn supply?

Triple pole and neutral supply


Why there is always a neutral wire in the supply of electricity to home?

For any electricity supply there has to be a pair of wires to carry the electric current. One of the wires is connected to earth at the transformer where the power comes from. That one is called the neutral. They can't both be grounded so only one of them is, and that prevents a buildup of static electricity.


How do you install a doorbell with four wires both having black and red wires?

It depends on what the wires are connected to and where the power supply is located. If the switch is lighted power has to get to the switch for the light. With a lighted switch you have a hot supply side, a neutral and then the wire going to the bell. So if Black 1 and Red 1 are supply voltage you would connect Red 1 to the hot side of switch, Black 1 would go to common as would Black 2. Red 2 would go to Bell side of the switch.


What is TPN power supply?

Triple pole and neutral supply


What is the full form of SMPS?

Switched Mode Power Supply


What does SMPS stand for?

SMPS stands for switched mode power supply


What is the population of Karachi Electric Supply Company?

Karachi Electric Supply Company's population is 17,000.


When was Karachi Electric Supply Company created?

Karachi Electric Supply Company was created in 1913-09.


What does double pole mean on a cooker control unit?

"Double-pole" refers to the type of switch used to disconnect the cooker from the incoming household electricity supply. Only by using a double-pole switch can the cooker's connections to both the live (or "hot") and neutral supply wires be switched on and off simultaneously.


All three legs of my dimmer are hot?

If the hot is connected to the supply and it is turned on and the switch is turned on and the neutral not connected this could be quite true. Connect the neutral to the supply neutral and shut the switch off. Now the only reading that you should get is the hot supply.