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Question
A tester is made to test the conductivity of poor conductor liquids. In the tester, LED bulb is used in the place of normal bulb because LED bulb needs ____ electric current in comparison.
A tester is made to test the conductivity of poor conductor liquids. In the tester, LED bulb is used in the place of normal bulb because LED bulb needs ____ electric current in comparison.
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Solution
The correct option is B Less
LED needs less electric current to glow compared to the normal bulb. The difference is, an LED does not need to burn filament to produce light. So, weak conductors can be tested with an LED-based tester. For example, materials like salt solutions which conduct electricity less easily than metal can be tested.
Less
LED needs less electric current to glow compared to the normal bulb. The difference is, an LED does not need to burn filament to produce light. So, weak conductors can be tested with an LED-based tester. For example, materials like salt solutions which conduct electricity less easily than metal can be tested.
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