The testing instrument's casing and grip/handle should be fully insulated from the current it is testing. If it was not then the current that would pass through you would be recognized as an electrical shock.
If you are using a proximity tester that senses current flow in its vicinity, it is possible that the box where the light is connected may also be used as a junction box for a separate device.
by using tester
if your looking for current (I) = voltage ./. resistance voltage (v) = current x resistance resistance (r) = voltage ./. current plug in your values calculate them then use meter to see if they match!
by using tester
An animal tester is a person who engages in animal testing, the practice of using animals in scientific experimentation.
Take a wire and ground the neutral at the load point. Some current will leak through ground and the same will be sensed by elcb and trip. Other method is simply test a lamp across phase and earth with out using neutral.elcb should trip if it is functioning correctly.
apply 3 phase voltage(415V) to the winding whose magnetising current is to be found and open circuit another winding. now measure current using tong tester or connecting an ammeter in series between supply and winding.
A current flows through, not across, a circuit. And, yes, you can measure it using an ammeter.
farzi....
A jeweler uses a tester to determine the authenticity of any gemstone. From below, the tester is used to: "...measure the speed of heat traveling through different types of stones." Some also test a diamond by using it to scratch glass, which destroys the glass.
Yes there is a tester that doesn't require test strips. The GlucoWatch G2 and other similar devices continuously monitor level using a small electric current.
When using an electric tester pen, it is important to follow safety precautions such as wearing insulated gloves, avoiding contact with water, ensuring the tester is properly calibrated, and always treating electricity with caution to prevent electric shock or injury.