The animation will  discuss the relation between resistance length,resistivity and area.In that animation You can change the length area and resistivity value using movable switch given there .Try to play with that.And get a feel on how exactly it changes. Animation of Variation of resistance...

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Question of the day

.       A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is             (A) 20 N                                                         ...

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Microscopic View of Electric current Animation

                                                                                                        microscopic view of atom microscopic view of flow of current inside the conductor ...

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Question of the Day

The capacitance of two oppositely charged metal spheres of same radius when far apart will be equal to         [a]2C                       [b]C/2         [c]C/4                      [d]...

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Alternating Current Fundamentals

Basics of Alternating Current var docstoc_docid="109660817";var docstoc_title="Basics of Alternating Current";var docstoc_urltitle="Basics of Alternating Current"...

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CET Questions

Question1:A charge Q is divided in two parts q and Q - q separated by a distance R. If force between the two charges is maximum, find the relationship between q & Q.Solution: F=K q(Q-q)/r2for max. &min.dF/dq=0 , q=Q/2Question2:A circular disc X of radius R is made from an iron pole of thickness t, and another disc Y of radius 4R is made from an iron plate of thickness t/4. then the relation between the moment of inertia Ix and Iy is (A) Iy=32Ix(B) Iy=16Ix(C) Iy=64Ix(D) None of theseSolution2:If t is the thickness and R is...

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CBSE Important questions chapterwise

Physics XII var docstoc_docid="34336239";var docstoc_title="Physics XII";var docstoc_urltitle="Physics XII"...

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Semiconductor Physics Notes (With good 3D pictures and energy level diagrams)

Semiconductor physics var docstoc_docid="109442376";var docstoc_title="Semiconductor physics";var docstoc_urltitle="Semiconductor physics"...

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Semiconducor Questions

Semiconductor Physics Questions and answers (CBSE) var docstoc_docid="109489315";var docstoc_title="Semiconductor Physics Questions and answers (CBSE)";var docstoc_urltitle="Semiconductor Physics Questions and answers (CBSE)"...

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Light Emitting Doide

Almost all LEDs are made of gallium with arsenic, nitrogen and phosphorus additives. A light emitting diode is a standard diode made of semiconductors of the Direct Band-Gap type of material with its junction physically arranged so it freely emits its photons in the desired direction. The diode is encased in transparent coloured or clear plastic often rounded so as to act as a lens. ( ref ) In direct band-gap materials, electrons do not change momentum when moving from conduction...

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Photo Electric Effect

How the emission of electrons depend upon the intensity of light and frequency is well explained in this animation Please go through it once,Its really awesome. For animation click he...

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Semiconductor diode animation link

How exactly charge carries flows inside the diode with different bias voltages are wonderfully explained in this animation . Please refer the below animation for Crystal clear concept in diode. For animation click he...

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Semiconductor Physics Doide Biasing

Diode Biasing REVERSE BIAS If the crystal has a negative voltage applied to the p-type and a positive voltage to the n-type crystals, then we REVERSE bias the diode. ( We could use a AA battery to do this! ) The positive holes are attracted AWAY from the junction. Similarly the negative electrons are also attracted AWAY from this region. We have reinforced the internal E Field with the imposed external field. A large energy difference for electrons in the Conduction Band will now appear across the junction and electrons will fail to cross...

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Solution For Objective Papers

Solution will be published as soon as possible.One important note to my students.Please become a member of this website.Because only the members can see the solution.And if you have any doubt You can post there.I will try to answer by the end of the day.Please make this website  as more interactive as possible. For membership you can directly sign in your Google accounts.Inform your friends also about this...

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Physics Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, (5)

The equation applicable in the adiabatic process of n mole ideal gas is... ΔU = nCpΔT ΔU = nCvΔT ΔQ = nCvΔT ΔQ = nCpΔT In a Carnot's engine, the working substance is... ideal gas steam petrol CO2 Two particles A and b initially at rest, move towards each other under a mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of centre of mass of the system is zero v 1.5v 3v Imagine a light planet revolving around a very massive star in a circular orbit of radius R with a period of revolution...

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Physics Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, (4)

A current of 5 A passes along a wire of length 1.0 m. the wire is at right angles to a magnetic field of flux density of 0.15 T. The force acting on the wire is... 0 0.03 N 0.75 N 33 N The end product of most radioactive decay series is usually some form of carbon helium hydrogen lead The cause of surface tension is... adhesive forces cohesive forces external forces gravitational force The unit 'poise' is... dyne.sec/cm2 dyne.cm/sec2 newton.sec/m2 dyne.sec/cm Emission line spectrum will be obtained from... candle flame sodium lamp Sun white...

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