What is sure test of electrification attraction or repulsion?
Repulsion is the sure test of electrification. Note: If two bodies are electrified (i.e., charged they can either attract or repel). If they are: (a) attracted: this is not only possible by electrification but can also be due to the attraction of an uncharged body with charged body.
Why repulsion is a sure test?
Repulsion is the sure test for magnetism because it occurs only when two like poles of a magnet exist while the attraction phenomenon can occur between two unlike poles of a magnet and also between a magnet and a magnetic material means if there are two magnets they will attract each other and suppose if one material …
What is the score check of presence of charges repulsion or attraction?
It can only be attracted due to induction of opposite charges on the charged body. However, if the test body is charged, it will be repelled by a tester charge of the same sign. Therefore, repulsion is a sure test for the presence of charge.
Why do we say that only repulsion is a sure test of charge on a body class 8?
Because when we bring a charged body near an uncharged body an opposite charge is induced on the neutral body. And their will an attraction between them. … Therefore, repulsion is a sure test of charge.
Why repulsion is a sure test of magnetism but attraction is not?
Repulsion can only take place between two like poles of a magnet. By attraction, one can not say if a substance is magnetic or not, but if two objects repel each other, one can be sure that those two objects are magnets. Hence, Repulsion is the sure test for magnetism.
Why is repulsion the surest way of testing polarity?
Repulsion eliminates attraction due to static electricity too. … If the piece in hand repels the other piece near it, then we know for sure that the repulsion is not due to induced magnetism or induced electric charges. Hence, it is a sure test of same polarity and of magnetism.
What is difference between conduction and induction?
In conduction, the neutral body is charged by the charged body by direct contact. In induction, the neutral body is charged without any direct contact between the neutral body and the charged body.
What does an electric charge in uniform motion produces?
Hence, when an electric charge is in uniform motion, it produces an electric field that is also changing in position and travelling through space. Thus, this changing electric field produces a changing magnetic field. … Hence, the electric charge in uniform motion produces both electric and magnetic fields.