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Formula for ohm’s law with example and problems

Ohm’s law states that: “The current flowing through a conductor is directly proportional to the potential difference across its ends provided the physical state such as temperature etc. of the conductor remains constant.”Formula for ohm’s law is “V=IR”. Ohm describes mathematically how voltage,current and resistance in a circuit are related.It is used in the equivalent form depending on which quantity ...

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Relationship between voltage and current

Relationship between voltage and current is describe in equation of ohm’s law (V=IR).Voltage is the amount of energy per charge which is required to move electrons from one point to another,while current is the rate of flow of charges.Difference between voltage and current are given in the table below. What is voltage in electricity? “Voltage is the amount of energy ...

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Resistance definition in physics and electricity

What do you mean by resistance? “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 the type ...

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Types of electric charges with formula and examples

Electric charge is defined as:”An electrical property of matter that exists because of an access or a deficiency of electrons.”There are two types of electric charge,positive charges and negative charges. Its formula is given as: Q =I × t Where Q is the total charge ,I is the amount of current and t is the time. Electric charge examples If you ...

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Coulomb’s law examples and problems

“Coulomb’s law states that  force of attraction or repulsion between two electric charges is directly proportional to their magnitudes and inversely proportional  to the square of distance between them”.Coulomb’s law examples are given below. Charles Agustin Coulomb (1736-1806) measured electrical attractions and repulsion  quantitatively and deduced the law that governs them.His apparatus,shown in fig. This figure resembles the figure given ...

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Gauss’s law and its applications

 Gauss’s law states that: “The total electric flux through any closed surface  is equal to 1/ε0 times the total charge enclosed by the surface.”Gauss’s law applications are given below. It is given by Karl Friedrich  Gauss ,named after him gave a relationship between electric flux through a closed surface and the net charge enclosed by the surface.It is applied to calculate ...

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Black body radiation and planck’s radiation law

What is black body radiation in physics? When a body is heated,it emits radiation.The nature of the radiation depends upon the temperature.At low temperature,a body emits radiation which is principally of long wavelengths in the invisible infrared region.At high temperature ,the proportion of shorter wavelength radiation increases. Furthermore,the amount of emitted radiation is different for different wavelengths.It is of interest ...

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Types of physical quantities

Physical quantities are those quantities which can be measured.Basically there are two types of physical quantities (Base quantities or fundamental quantities) and (Derived quantities). These are quantities that are used to describe the laws of physics. Physical quantities may be divided into six categories. Constant or ratio Such quantities have the only magnitude, for example, refractive index, dielectric constant and ...

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types of motion in physics with examples and pictures in daily life

What does motion mean? “A body is said to be in motion,if it changes its position with respect to its surroundings.” Surroundings are the places in its neighborhood where various objects are present.The state of rest or motion of a body is relative.For example,a passenger sitting in a moving bus is at rest because he is not changing his position ...

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difference between microscope and telescope in tabular form

Microscope and telescope are two optical devices and are used for different purposes.Microscope is an optical device which is used to see very small objects ( Unicellular organisms),While telescopes is an optical instrument which is used to see very large objects in space.More difference between microscope and telescope are given in the table below.  microscope and telescope comparison table   ...

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