Question

why some liquids can be tested for conductivity by LED and not by bulb?​

Answer 1

Answer:

because in liquids ,the electricity passes is not too much high to light up a bulb . And an LED has ability to glow even if the current is low . that's why LED is used to test electrical conductivity in liquids.

Answer 2

Answer:

$\huge\tt{\fcolorbox{red}{yellow}{ANSWER}}$

because in liquids ,the electricity passes is not too much high to light up a bulb . And an LED has ability to glow even if the current is low . that's why LED is used to test electrical conductivity in liquids.