Like Charges Repel and Unlike Charges Attract Each Other

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  • Опубликовано: 2 окт 2024
  • Like Charges Repel and Unlike Charges Attract Each Other
    Let us demonstrate this with an experiment:
    (1) Like charges repel each other, while unlike charges attract each other
    (2) All the objects are positively or negatively charged. Rubbing an object helps to separate the charges.
    (1) Take an ebonite rod and charge it by rubbing with wool and suspend it with the help of a thread on an iron clamp, so that it may swing horizontally.
    (2) Similarly, take another ebonite rod and rub it with wool and bring it near the suspended ebonite rod. You will observe that the two ebonite rods repel each other.
    (3) Now take a glass rod and rub it with silk to charge it. Bring the charged glass rod near to suspended ebonite rod. You will observe that the glass rod will attract the ebonite rod.
    (4) Now again take a charged glass rod and suspend it from the iron clamp as you did in the first case. Rub another silk rod with silk and bring it to suspended charged glass rod. The two glass rod will repel each other.
    Conclusion of the experiment:
    (i) All the substances are made up of atoms and an atom contains charged particles. The particles are positively charged and negatively charged. The particles that carry negative charge are called electrons and the particles that carry positive charge are called protons.
    (ii) So substance having equal number of protons and electrons means that the negative and positive charges are equal, hence they balance each other and makes substance electrically neutral.
    (iii) But when we rub any object against another object, some of the negative charges (electron) travel from one object to another. The object loosing negative charge becomes positively charged, whereas the object receiving negative charges becomes negatively charged.
    (iv) Hence in the experiment demonstrated, the glass rod when rubbed with silk becomes positively charged and ebonite rod when rubbed with wool becomes negatively charged.
    (v) We conclude that
    (a) Two negatively charged object (ebonite rod) repel each other
    (b) Two positively charged object (glass rod) repel each other
    (c) A positively charged object (glass rod) attracts a negatively charged object (ebonite rod)
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