Figure Secondly, what does charging by friction mean? The triboelectic charging process a. As a result, the atoms of rubber pull electrons from the atoms of animal fur, leaving both objects with an imbalance of charge.
Charging by Induction. When charging a conductor by induction , a charged object is brought close to but does not touch the conductor. In the end the conductor has charge of the opposite sign as the charge on the object. Bring the charged object close to, but not touching, the conductor. There are three ways to charge an object : friction, conduction and induction.
Friction involves rubbing on material with another, resulting in electrons moving from one surface to another. Two charged objects may come in contact , and electrons may move from one object to the other. Electrons always move from the object with a larger negative charge less positive to the object with the smaller negative charge more positive. When you rub glass rod to a silk, glass lose electron and positively charged and silk gain electron and negatively charged.
In this picture, negatively charged rod touches to the neutral sphere and some of the electrons pass to the sphere. As a result neutral sphere is charged by contact. There are two types of electric charge : positive and negative commonly carried by protons and electrons respectively. Like charges repel each other and unlike charges attract each other. These positive and negative charges attract the two closer and if they touch each other, positive charges get nullified and both bodies become negatively charged.
Once both are negatively charged , they tend to repel each other. Positive charge is carried by the protons in material and negative charge by electrons. The overall charge of an object is usually due to changes in the number of electrons.
To make an object : Positively charged : electrons are removed making the object electron deficient. The SI unit of charge is coulomb C. The smallest unit of charge is the charge of the electron though I doubt that because quarks are found to exist within proton and electrons with. Electricity is everywhere, even in the human body. Our cells are specialized to conduct electrical currents.
Resting cells are negatively charged on the inside, while the outside environment is more positively charged. This is due to a slight imbalance between positive and negative ions inside and outside the cell.
For induction to take place, the two bodies must be placed nearer to each other. We have already discussed that current in any conductor flows due to the movement of charge carriers.
Suppose we have a negatively charged body, so the movement of the charges inside the body generates electric current.
We know that when current flows through a conductor then the magnetic field is produced across it. And according to Faraday when an uncharged body is placed in a region where the magnetic field is present then the electric field gets generated inside it.
More simply we can say charges of opposite polarity present in the charged body get induced to the uncharged body. Thus the generated electric field in the second body causes flow of current through it in the opposite direction.
It is noteworthy here that the magnetic field shows variation according to the change in the electric field of initially charged conductor and so the induced electric field in the other body. Thus in this way, we can say that current flowing to one conductor gets induced in the other conductor placed near to it.
So, this discussion simply concludes that conduction allows the charge flow due to electric field produced inside it. But induction permits flow of charge carriers due to change in magnetic field. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Remember Me. Lost Password Lost your password? Answer: the main difference between charging by contact and charging by induction is that in the first case, the two objects are touching, while in the second case, the two objects do not touch Explanation: There are three methods of charging an object: — Charging by friction: this is done by rubbing an object against another object.
When this is done, electrons are transferred from the wool to the rod, so both objects remain charged at the end of the process — Charging by contact: this is done by putting in contact a charged object with a neutral, conducting object. Leave an answer. Featured image Select file Browse.
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