How can we determine an object is positive or negatively charged without using any electrically charged body, i.e. , we use another electrical body to detect the electrical charge of a given body, but how this process is done first, when we are not aware of negative and positive charges?
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ind the electric field, we can use the electric field to determine how any other charged particles would move around the charged object.
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They repel each other and open up. In this way, we can detect whether an object is charged or not. To check whether a body has a positive or negative charge, we need a charged electroscope with a known charge. We need to touch the charged body to the metal disc of the electroscope
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