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Electric Charges Electric charge is a fundamental property like mass; length etc. Electric charge is the property responsible for electric forces which acts between nucleus and electron to bind the atom together. Charges are of two kinds negative charge positive charge Electrons are negatively charged particles and protons, of which nucleus is made of, are positively charged particles.
Actually nucleus is made of protons and neutrons but neutrons are uncharged particles. Electric force between two electrons is same as electric force between two protons kept at same distance apart i.
SI unit of charge is Coulomb written as C. Charge on electron is Watch this tutorial for learning about electric charge and conductors. Conductors and insulators There is a category of materials in which electric charges can flow easily while in other materials charges cannot flow easily.
Substances through which electric charges can flow easily are called conductors.
All metals like copper, aluminum etc. Substances through which electric charges cannot flow are called insulators. Few examples of insulating materials are glass, rubber, mica, plastic, dry wood etc. Presence or absence of free electrons in a material makes it a conductor or insulator.
Conductors have free electrons which are loosely held by nuclei of their atoms whereas insulators do not have free electrons as in insulators electrons are strongly held by nuclei of their atoms.
Related Problems Following are the related problems for the topics given in this page. I insist that you must solve them before proceeding to next page for new topics. These are very easy questions that you can attempt by memorizing the concepts and definitions given in this page Question 1 Calculate the number of electrons constituting one Coulomb of charge?
What is the difference between static and current electricity? Static or fractional electricity is caused by the build up of electrical charges on the surface of objects, while current electricity is a phenomenon involving the flow of electrons along a conductor.
Current electricity is normally controlled, and it is the more used phenomenon of electricity, in countless applications. Static electricity is usually uncontrolled, and just happens occasionally or at irregular intervals.
Current electricity is generated by batteries and power plants. Where does charge come from? The process of acquiring charge consists of transferring of electrons from one body to another, so that one body has an excess and the other a deficiency of electrons.
It was not until the end of nineteenth century that electrons were found to be very small, negatively charged particles. Electrons were discovered by Sir J.
To give a body an excess negative charge, we may add a number of electrons.
And to give excess of positive charge, we may remove the electrons from the body.PCCL | INTERACTIVE ELECTRICITY SIMULATIONS | Flash animations - applet - for free on-line electricity learning | Interactive Physics Simulations | Interactive Physics Animations | Educational support in flash animations for electricity at middle school, high school and academy for sciences classroom.
Oscilloscope. Multimeter, intensity, . AC electricity is the opposite of DC or direct current electricity, which is a unidirectional flow of electrons.
This type of circuit operates in a flashlight or calculator that uses batteries as a power supply. 1. Introduction Physical phenomena associated with the presence and flow of electric charge is known as electricity.
Electricity and electrical phenomenon have a lot of applications in our day to day life and they also gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and the flow of electrical current.
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Electricity has always been my weakness in A-level physics. Was doing a specimen paper and this was the only question I did really bad on: I got right (I3 = I1 + I2) but can't do the two questions after that.