How to check presence of electricity

We now that when a current flow through a conductor it's produce an electric field. like the animation show when an electric field is produce,you can find the presence it by adding iron filing.

You can't use iron filings to check presence of electricity. There's way to check presence of electricity.

Test pen

When the test pen touch to the conductor,the light in test pen will glow. This means there's presence of electricity.





Test Lamp

When the live and neutral wire are connected to check the out going current, the lamp will glow to show there's is presence of electricity.

Electric Voltage Detector 

 

When the detector place near to switch,or outlet of any electrical application,the detector will make a Beep sound to show presence of electricity.

Multi Meter

Place positive prob to live and negative prob to neutral and turn the range to AC voltage. The multi meter will show the current rating and the presence of electricity.