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Author Archives: admin

Energy stored in a capacitor equation derivation

Energy stored in capacitor equation Consider a capacitor with the capacitance ‘C’ ,which is connected to the battery of emf ‘V’ .If ‘dq’ charge is transferred from one plate to other,then the work done ‘dW’ will be: dW =V dq This work done is stored in the form of electric potential energy ‘dU’ dU =V dq When the capacitor is ...

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capacitance with two different dielectrics equation

Capacitance with dielectric formula Consider a parallel plate capacitor which is connected with a battery of emf ‘V’ .Let ‘A’ is the area of each plate and ‘d’  is separation between the plates. If ‘q’ charge is stored in the capacitor when there is vacuum or air as medium between the plates ,then: q= CV Where ‘C’ is the capacitance ...

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formula for total capacitance in series and parallel combination

Formula of equivalent capacitance in series Series combination when capacitors are connected in series,the total capacitance is less than the smallest capacitance value because the effective plate separation increases.The calculation of total series capacitance is analogous to the calculation of total resistance of parallel resistors. This type of combination has the following characteristics: Each capacitor has the same charge across ...

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thermister temperature sensor with types and applications

Thermistor definition A thermistor is a type of  variable resistor that is temperature sensitive . How thermistor works? When its temperature coefficient is negative,the resistance changes inversely with temperature. When its temperature coefficient is positive the resistance changes directly with temperature. The resistance of a photo-conductive cell changes with a change in light intensity.This cell also has a negative temperature coefficient. Symbols for ...

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Image formation by convex and concave lens ray diagrams

 converging and diverging lenses ray diagrams In mirrors images are formed through reflection but lenses form images through refraction.This is explained with the help of ray diagrams as follows: Image formation by convex lens ray diagrams Image formation in convex lens can be explained with the help of three principal rays shown in figure. The ray parallel to the principal ...

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Difference between scalar and vector quantity in tabular form

 What are the differences between scalars and vectors?   Scalars  vectors Physical quantities having magnitude only but no direction are called scalar quantities. Physical quantities having magnitude and direction are called vector  quantities.   Scalar quantities are completely described by: 1:a number 2:a suitable unit vector quantities are completely described by: 1:a numbers 2:by a suitable unit 3:By certain direction ...

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Mechanics and its different branches in physics

What is mechanics in physics? The branch of science that deals with the study of motion of body,its causes and effects. The importance of mechanics It is the oldest of the physical sciences,is the study of the motion of objects.The calculation of the path of a baseball or of a space probe sent to Mars is among its problems,as is ...

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Different types of vectors in physics with images

A vector is represented graphically by a directed line segment or an arrow head line segment.The length of line,according to the scale chosen ,represents the magnitude of the vector while arrow head indicates the direction.Also they follow triangle law of addition.For example force,acceleration,torque,momentum ,angular momentum etc.To represent a vector we need: A suitable scale Reference axis x,y & z axis ...

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Different types of logic gates(AND,OR,NOT,NOR,NAND,XOR,XNOR)

What are universal logic gates? Digital systems: A digital systems deals with quantities or variable which have only two discrete values or states. The examples of such quantities are: A switch can be either open or close. A certain statement can be either true or false. The answer of a question can be either yes or no. A bulb can ...

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Difference between astable monostable and bistable multivibrator

what is multivibrator? The name mutivibrator designates a group of the circuits widely applied for switching as shift registers or temporary memories and as square were timing oscillator or clocks. These circuits are basically closed loop feedback circuits operating with the feedback. Types of multivibrators There are three general types of multivibrators, which are: The astable or free running mutivibrator ...

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