1132 1133 use this diagram of a homemade electroscope to answer the next two questions the circles are cheerios that will take a static charge. C stepz lightning 2 rub the comb with a piece of cloth or fur [combing your hair may also do the job) this rubbing causes minus charges to move from the cloth to the comb then hold the comb on the paper. The two ends of a magnet are always different from each other the end that points north, if allowed to move freely, is called the north pole the other end is the south pole these magnetic poles behave rather like electric charges poles of opposite kinds attract each other, while poles of the same kind repel. On rubbing, some negative particles are transferred from one substance to the other and the latter develops a negative charge (silk rubbed on glass) transferred the substance (glass) from which particles are removed loses negative charge hence, it develops a positive charge. After rubbing, take your hand out of the bag and bring both the bag and cloth near the strips of tape most charged objects will attract one strip and repel the other.
Since ancient history it is known that some materials attract light particles after rubbing the greek word for amber , ήλεκτρον ( electron ), gave name for many areas of natural science. Electrons being attracted to the rod, leaving more positive charges than negative on the side of the ball opposite the rod when you touch the ball, electrons flow from your. Since classical physics, it has been known that some materials such as amber attract lightweight particles after rubbing the greek word for amber, ήλεκτρον, or electron, was the source of the word 'electricity.
Other, and the glass rod and the silk attract each other these experiments and many others like them have shown that there are exactly two kinds of electric charge: the kind on the plastic rod rubbed with fur and the kind on the glass rod rubbed with silk. It was discovered that after rubbing two pieces of glass with two pieces of silk cloth, not only did the glass pieces repel each other, but so did the cloths the same phenomenon held for the pieces of wool used to rub the wax. Explain to students that two protons repel each other and that two electrons repel each other but a proton and an electron attract each other another way of saying this is that the same or like charges repel one another and opposite charges attract one another. Two particles of the same charge exert a repulsive force on each other, and two particles of opposite charge exert an attractive force on each other most of the common objects we deal with in the macroscopic (human-sized) world are electrically neutral. After removing the tabs from the cans, tie the thread to one of them discard the other tab tie the other end of the thread to the plastic pen use the cans, separated by about three inches, as supports for the pencil.
In some greek experiments, objects attracted each other after rubbing other experiments produced objects that pushed away, or repelled, each other the evidence showed that electric force made matter either attract or repel other matter. Scientific american is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives. Introduction to electric charge and electric field the image of american politician and scientist benjamin franklin (1706-1790) flying a kite in a thunderstorm is familiar to every schoolchild. From what we did discover, we saw that like charges repel each other, while opposites attract (some people say they do as well) as a group we decided that the only way an object can become charged is to have charge transfered to it from another object. The goal of the static electricity project is for students to put their knowledge of protons, neutrons and electrons into use by observing various electrical charges students should be able to identify if an object is an insulator or a conductor.
The traditional explanation for the balloon experiment goes like this: friction causes the balloon and hair to transfer electrons, leaving each item with a uniform opposite charge. Thales of miletus, a greek philosopher, discovered that rubbing amber with silk created an electric charge in the amber which caused objects to be attracted to it if rubbed enough, it created a. Both positive and negative charges exist in neutral objects and can be separated by rubbing one object with another for macroscopic objects, negatively charged means an excess of electrons and positively charged means a depletion of electrons. Furthermore, objects electrified by the same machine appeared to repel each other (like magnets of the same charge) and objects electrified in different ways (one by touching an electric machine, for example, and the other, say, by rubbing amber) would attract each other (like magnets of opposite charge.
The franklin era benjamin franklin's experiments benjamin franklin (1706-1790) started his investigations after gilbert yes, he did fly a kite on an overcast day (no actual lightning), but he wasn't the first person to. They said items with the same fluid attract each other and opposite types of fluid in objects will make them repel each other all of this was only partially right. The electrons contained within the objects are prone to move or migrate to other objects the process of an electron leaving one material object to reside (perhaps only temporarily) in another object is a common everyday occurrence. Objects may become charged in many ways, including by contact with or being rubbed by other objects this means that they can gain extra negative or positive charge orf example, charging happens when you.