Which of the following statements are true about a LED bulb?

It glows only when high current passes through it.

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It can glow even when a low current passes through it.

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The longer terminal indicates the positive terminal.

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The shorter terminal indicates the positive terminal.

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Solution

The correct options are
B It can glow even when a low current passes through it.
C The longer terminal indicates the positive terminal.
The given figure contains a Light Emitting Diode (LED). It glows even if a very weak current passes through it. It is used as an indicator in various electrical circuits or appliances. The longer terminal indicates the positive terminal and the shorter terminal indicates the negative terminal.

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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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