Question
In the tester, LED bulb is used in place of a normal bulb because LED bulb needs ____ electric current in comparison. 
Answer: Option B
:
B
LED needs less electric current to glow compared to the normal bulb. LED does not need to burn filament to produce light. Hence, LED-based tester is better for testing conductivity of liquids (like salt solutions) with low electrical conductivity.
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:
B
LED needs less electric current to glow compared to the normal bulb. LED does not need to burn filament to produce light. Hence, LED-based tester is better for testing conductivity of liquids (like salt solutions) with low electrical conductivity.
Was this answer helpful ?
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