PROJECT ID: CLASS12TH|PHYSICS|CAPACITOR [DESIGN,TYPES,USES]02
Important viva questions - coming soon
working model - coming soon
Good books for class
12th
MODERN ABC
A perfect tool for the students to enrich their knowledge about
different principles and laws is this set of ABC Physics textbooks. Published
by Modern Publishers. The author has tried his best to explain all the
scientific methods, theories, and experiment in simple, easy to understand
format. Available in a set of 2 volumes, these books are ideal for those, who
want to excel in this subject not only by scoring high marks in the examination
but by gaining an in-depth knowledge of the subject.
Salient
Features of the Textbook
• Chapters are well covered and scientific methods are explained in lucid language so that students are able to get a clear understanding of the concepts and principles in it.
• Interactive chapters help the students to not only learn but also simultaneously exercise the concepts.
• Chapter wise summary makes it easy for the candidates to recap the points learned.
• The textbook contains previous year’s questions so that the students get a chance to self-evaluate their knowledge base as well as sharpen their time management skills.
• Chapters are well covered and scientific methods are explained in lucid language so that students are able to get a clear understanding of the concepts and principles in it.
• Interactive chapters help the students to not only learn but also simultaneously exercise the concepts.
• Chapter wise summary makes it easy for the candidates to recap the points learned.
• The textbook contains previous year’s questions so that the students get a chance to self-evaluate their knowledge base as well as sharpen their time management skills.
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SL ARORA
New Simplified Physics: A Reference Book - Class 12 is a set of two volumes, which comprehensively covers the entire Physics syllabus of Class 12th. Students who want to excel in their final examinations should study from this guidebook. Physics is an academic discipline which helps us understand how the universe behaves. It can be broadly categorised into two parts, namely Classical Physics and Modern Physics. The first branch covers laws that are highly applicable in everyday scales. Modern Physics is used to describe laws that have been developed in the early 20th century and onwards. It focuses on quantum mechanics and the interactions and behaviours of matter and energy.
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PROJECT SUMMARY
1. INTRODUCTION: A capacitor is a device that
stores electrical energy in an electric field. It is a passive electronic
component with two terminals.
The effect of a capacitor is known
as capacitance. While some capacitance exists between any two electrical
conductors in proximity in a circuit, a capacitor is a component designed
to add capacitance to a circuit. The capacitor was originally known as a condenser or condensator.
This name and its cognates are still widely used in many
languages, but rarely in English, one notable exception being condenser
microphones, also called capacitor microphones.
2. Amount of
Charge “Q” A Capacitor Can Store: The amount of charge Q a capacitor can store depends
on two major factors- the voltage
applied and the capacitor’s physical characteristics, such as its size.
3. UNIT, The unit of capacitance is the
farad (F), named for Michael Faraday (1791-1867), an English scientist who
contributed to the fields of electromagnetism and electrochemistry. Since
capacitance is charge per unit voltage, we see that a farad is a coulomb per
volt 1𝐶 /1𝑉 = 1f . A 1-farad
capacitor would be able to store 1
coulomb with the application of only 1
volt. One farad is, thus a very large capacitance. Typical capacitors range
from fractions of a picofarad to millifarads. Self-Capacitance ,Self-capacitance property is related to the capacitors
especially to the isolated conductor to raise its potential difference to one
volt. Generally normal conductors will have mutual capacitance. This is also
measured in the S.I units i.e. Farads.The Self-capacitance
of a conducting sphere which has the radius ‘R’ is given by C=4πεoR Self-capacitance
values of some standard devices are given below.For the top plate of a van de Graff generator
which is having radius of 20 cm self-capacitance is 22.24pF.2. For the planet EARTH self-capacitance
is 710 µF Charging & Discharging of a
Capacitor,Let us assume that the capacitor, which is shown in the
Figure below in the circuit, is completely discharged. In this circuit the
capacitor value is 100 µF and the supply voltage applied to this circuit is
12V. Now the switch which is connected to the capacitor in the circuit is moved
to the point A. Then the capacitor starts charging with the charging current I.
The charging voltage across the capacitor is equal to the supply voltage when
the capacitor is fully charged
i.e. VS = VC = 12V. In the case of ideal
capacitors the charge remains constant on the capacitor but in the case of
general capacitors the fully charged capacitors is slowly discharged because of
its leakage current. When the switch is moved to the position B, then the
capacitor slowly discharges by switching on the lamp which is connected in the
circuit.Energy in a Capacitor,
4. Uses of Capacitors:
Capacitors
are devices which store electrical charge. They are a basic component of
electronics and have a host of various applications. The most common use for
capacitors is energy storage. Additional uses include power conditioning,
signal coupling or decoupling, electronic noise filtering, and remote sensing.
Because of its varied applications, capacitors are used in a wide range of
industries and have become a vital part of everyday life. Capacitors have found increasingly advanced applications in information
technology. Dynamic Random Access Memory (DRAM) devices use capacitors to
represent binary information as bits. The device reads one value when the
capacitor is charged and another when discharged. Charge Coupled Devices (CCDs)
use capacitors in an analogue form. Capacitors are also used in conjunction
with inductors to tune circuits to particular frequencies, an effect exploited
by radio receivers, speakers and analog equalizers.
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