(a) Like charges attract each other (T/F)” is False (F). Like charges repel each other, while unlike charges attract each other.
Explanation:
Like charges: Charges that have the same sign, either both positive or both negative.
Unlike charges: Charges that have opposite signs, one positive and one negative.
Electromagnetism: The fundamental principle of electromagnetism states that like charges repel each other, and unlike charges attract each other. ( b) A charged glass rod attract a charged plastic straw” is True. When a glass rod is rubbed with silk, it becomes positively charged. When a plastic straw is rubbed with a polylene sheet, it becomes negatively charged. Opposite charges attract each other, so the positively charged glass rod will be attracted to the negatively charged plastic straw. (C) Lightning conductor cannot protect a building from lightning” is False. A lightning conductor, also known as a lightning rod, is a metal rod installed on buildings to protect them from lightning strikes. It provides a low-resistance path for the electrical current to flow safely to the ground when a lightning strike occurs, preventing the current from flowing through the building’s structure. This helps to minimize damage to the building caused by the electrical current. (D) This statement is false; earthquakes cannot be predicted in advance.
Explanation: While scientists understand the causes of earthquakes, there is no reliable method to predict when and where they will occur. Some systems can provide early warnings of potential earthquakes in specific areas, but not the exact time and location of a major event. There have been attempts at prediction using various methods, but none have proven successful or reliable enough to be considered true prediction.
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