LED is better than bulb to use in a tester as :

it glows even when weak current passes through it.

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it emits more light.

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it is cheaper.

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all of the above

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Solution

The correct option is A it glows even when weak current passes through it.
LED is better than bulb to use in a tester as it glows even when a weak current passes through it.

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Similar questions

LED glows even when a ______ electric current passes through it. Fill in the blank.

Name a device which glows even when a weak electric current passes through it.

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