Electro-Static Revision Notes
*Electric Current is a flow of electric charges, consisting of electrons. Two types of charges - positive and negative. No charge matter is neutral. Forces between charges are called electrostatic forces. - Like charges repel, unlike attract.
*Rule - charge must always be conserved, it cannot be created or destroyed.
*Current measured with an ammeter, voltage measured with a voltmeter.
*Current (I) = Charge (Q) / Time (t)
*Coulomb (C) is amount of charge passing a point when a current of an ampere flows for a second.
*Electricity is conducted only through material soluble in water when in water, aqueous solutions and in a molten state.
*Material allowing flow of charge is a conductor otherwise an insulator.
*Instrument used to show the existence of a charged object is called a gold leaf electroscope, which moves in a certain direction depending on the charge on the object once the leaf has been charged and another charged object is brought near it.
*Two main processes for an object to gain charge, other than friction - charging by contact and by induction (charge separation).
*Coulomb's Law - Force (F) = (k.q1.q2) / r2
Coulomb's constant is k, q is charge and r is distance - if more than two charges use vector addition - find the resultant.
*Electric field is produced by a charge or a combination of charges. Forces are felt depending directly on the test charge placed in the field.
*Electric Field, E = F / q
E = q / 4 Ú0 r2
*Comparison with gravity - Force felt by objects with charge - Force felt by objects with mass. Force proportional to size of charges - Force proportional to size of masses. Force inversely proportional to square of separation of charges - Force inversely proportional to square of separation...
Reviews of: "Electro-Static Revision Notes"
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u did great job, it helped me a lot for test
fantastic notes to study from - it helps a lot!
wow, good work. Good revision aid
I dont classify this as an essay. its more of learning the basic physical aspect of physics in micro and macro sense.
when you use formula's where there is constant involved, such as the permisitivity, its ideal to write there equavalent.
Some of your explanation are not fantasticly superb but at least you know the formula's and hopefully the concept of it.
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Whoa
This is a really good review sheet, few minor problems (ex: tenses and electroscope isnt always gold leaf). Not gona hurt rating tho
3 out of 3 people found this comment useful.