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resistor and its types

A resistor is an electrical component with a known specific value of resistance.It is probably the most common component in all kinds of electronic equipment ranging from a small radio to a colour television receiver.As its name suggests ,a resister resists or opposes the flow of current through it.Resistance is necessary for any circuit to do useful work.In fact,without resistance,every ...

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Difference between resistance and resistivity

What is the definition of resistance in physics? “Resistance is the property of material that restricts the flow of electrons.”When there is current in a conductive material ,the free electrons move through the material and occasionally collide with atoms.These collisions cause the electrons to lose some of their energy,and thus their movement is restricted.This restriction varies and is determined  by ...

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What is the difference between voltage and current?

What is voltage in electricity? “Voltage is the amount of energy per charge available to move electrons from one point to another in an electric circuit.”It is the driving force in electric circuits and is what establishes current.As you have seen,a force of attraction exists between a positive and a negative charge. A certain amount of energy must be exerted,in ...

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Capacitance in series and parallel circuits examples & problems

What is capacitance? “Capacitance is the amount of charge that a capacitor can store per unit of voltage across its plates.”It is denoted by C.That is capacitance is a measure of a capacitor’s ability to store charge.The more charge per unit of voltage that a capacitor can store,the greater its capacitance,its formula is given as: C=Q/V Where C is capacitance,Q ...

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Different types of capacitors and their uses with images

What is capacitor? “A capacitor is device that can store charge.”Apart from resistors and inductors a capacitor is the other basic component commonly used in electronic circuits.It is a device which  has the ability to store charge which neither a resistor nor an inductor  can do , it opposes any change of voltage in the circuit in witch it is ...

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Electric charge:types,examples and properties

What is the definition of  Charge in physics? Electric charge is defined as:”An electrical property of matter that exists because of an access or a deficiency of electrons.” If you walk across a carpet in dry weather,you can draw a spark by touching a metal door knob.On a grander scale,lightning is familiar to everyone.Such phenomena suggest the vast amount of ...

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