A tester for detecting electric current utilizes some effect of electric current to detect its presence. Which of the following components can be used for this?

A light bulb

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An LED

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A magnetic compass

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All of these

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Solution

The correct option is D
All of these

All of these can be used to detect current. A light bulb and an LED will glow if current passes through it, and a magnetic compass needle will show a deflection if current flows through a wire in its proximity.

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A tester for detecting electric current utilizes some effect of electric current to detect its presence. Which of the following components can be used for this?

The correct option is D All of these All of these can be used to detect current. A light bulb and an LED will glow if current passes through it, and a magnetic compass needle will show a deflection if current flows through a wire in its proximity.

The correct option is D
All of these

All of these can be used to detect current. A light bulb and an LED will glow if current passes through it, and a magnetic compass needle will show a deflection if current flows through a wire in its proximity.