Why some liquids can be tested for conductivity by LED and not by bulb?
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7
Explanation:
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.
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3
when electric current flows through a bulb then due to heating effect of current, the filament of the bulb gets heated up to a high temperature and it starts glowing .now for a liquid having low electric conductivity,the current flowing through the circuit is very weak due to which the filament does not get heated sufficiently and hence the bulb does not glow therefore led is used in place of bulb because LED glows even when weak current flows in the circuit
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