In the tester, LED bulb is used in place of a normal bulb because LED bulb needs ____ electric current in comparison.

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Solution

The correct option is B
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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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In the tester, LED bulb is used in place of a normal bulb because LED bulb needs ____ electric current in comparison.

The correct option is B less 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.

The correct option is B
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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.