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Author Archives: admin

Pascal’s principle (law): formula,applications & examples in real life

Archimedes principle Pascal law What is Pascal’s Law and how do we use it? An external force applied on the surface of a liquid increases the liquid pressure at the surface of the liquid. This increase in liquid pressure in transmitted equally in all directions and to the walls of the container in which it is filled. This result is ...

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Uses and applications of total internal reflection

Total internal reflection

What is total internal reflection? When a ray of light travelling in denser medium enters into a rarer medium, it bends away from the normal. If the angle of incidence ‘i’ increases’ the angle of refraction ‘r’ also increases. For a particular value of the angle of incidence, the angle of refraction becomes 90°. The angle of incidence, that cause ...

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Difference between forward and reverse biasing of semiconductor diode

Forward Biasing definition The bias a diode,you apply a dc voltage across it. Forward bias is the condition that allows current through the pn  junction. A dc voltage source connected by conductive material (contacts and wire) across a diode in the direction to produce forward bias. This external bias voltage is designed as V BIAS. The resistor limits the forward current to a ...

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What is difference between step up and step down transformer?

Step up transformer: If (Ns greater than NP) and (Vs is greater Vp) such a transformer in which voltage across secondary is greater than the primary voltage is called a step up transformer.A step up transformer has more turns in its secondary winding than its primary winding and is used to increase the ac voltage. The turns ratio for a step up ...

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Magnetic hysteresis loop for ferromagnetic materials

Hysteresis Loop definition To investigate a ferromagnetic material, a bar of that material such as iron is placed in an alternating current solenoid. When the alternating current is at its positive peak value, its fully magnetises the specimen in one direction and when the current is at its negative peak, it fully magnetises it in opposite direction. Thus as the ...

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Instantaneous velocity:Formula examples and problems

Instantaneous velocity “If a body covers small displacement in in small interval of time than its velocity will be instantaneous velocity such that Δt is equal to zero.”Where Δt is the small interval of time.Average velocity does not tell us about the motion between two points on the path.The path may be straight or curved and the motion may be steady or ...

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What is difference between angular and tangential velocity?

The angular displacement covered by a body in unit time and tangential velocity is the velocity, which is tangent to the circular path. Now! We learn in detail about these quantities in an easy way.Keep reading…. Angular velocity “Time rate of change of angular displacement is known as angular velocity.”It is denoted by ω,its formula is given by: Unit of angular velocity ...

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Relation between escape velocity and orbital velocity formula

What is  Escape velocity ? “The velocity required by a body to escape from the earth’s gravitational field.”It is our daily life experience that  an object projected upward comes back to the ground after rising to a certain height.This is due to the force of gravity acting downward.With increased initial velocity,the object rises to the greater height before coming back.If ...

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law of conservation of momentum formula & examples in real life

Guess now! Why the passengers in the bus move forward when the bus stops quickly? What happens when two bodies strike with each other? Why gun recoils back after firing? Do  you want to learn this types of questions then? Let start: Law of conservation of momentum definition According to this law:”The momentum of an isolated system of two or ...

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Difference between stable unstable and neutral equilibrium with examples

Types  of equilibrium in physics There are three states or types  of equilibrium in physics Stable equilibrium Unstable equilibrium Neutral equilibrium Stable equilibrium “A body is said to be in stable equilibrium if after a slight tilt it returns to its previous position.” Consider a book lying on the table.Tilt the book slightly about its one edge by lifting it ...

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