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Question

Which device can be used to test whether an object is carrying charge or not?


  1. Electroscope

  2. Electrode

  3. Electrolarynx

  4. Electric motor


Solution

The correct option is A

Electroscope


A device that is used to test whether an object is carrying a charge or not is known as electroscope.

In an uncharged electroscope, the electroscope leaves hang straight down.
When a charged object touches the metal knob of the electroscope, electric charges travel down the rod and into the leaves. Following the principle that like charges repel each other and unlike charges attract, the leaves spread apart. This indicates the presence of an electric charge

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