Answer / deepak

inside the tester their is a resistor which limits the current flowing through it hence we dont get shock. n we touch the finger only for complete the ckt.

Answer / selvakumar

The contact(finger touch) is connected in series with the
pulp with metallic line contact through a resistor. The
resistor drops sufficient voltage such that we wont have a
shock while testing.
Complete isolation of our body from earth is impossible
unless we float in the air.Depending on the insulation
(shoes,bare legs,wood,Rubber mat...,,) to ground the light
intensity varies.

Answer / phaseneutral

Neon line tester has a high value resistor inside. It protecting you from electric shock.
More explanation watch this video
https://youtu.be/FsV9J3XINWQ

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