EC STUDY

Van de Graaff Generator     It is an arrangement established by Van De Graaff to building up high potential difference of order 10^7 volts. It works on the following two principles The charges given to the sphere spread to the outer surface of the conductor                  if two concentric spherical conductors are connected by a wire, the charges will flow from the inner conductor to outer conductor, whatever be the potential of the conductor.     2. Discharging action of sharp points ( Corona Discharge )          The surface charge density of a conductor is  σ =Q/A.   which means the charge density is more in small or sharp region.  Construction Of Van de Graaff Generator It consisted of a large hollow metallic sphere mounted on two insulated supporting columns. An endless belt of an  insulating material (Nylon) is mounted on pulleys P1 & P2 which is run by a motor. Two sharp metal combs C1 and C2 are fixed near the pulleys P1 and P2 respectively. Comb C1 is connected to a high

Energy Stored In A Capacitor     We have already studied that capacitors store electrostatic energy in it. Today we will learn how they store energy? and how much energy can be store in a capacitor? As always to find the energy we have to find the work done. So, consider a small positive charge +dQ, work has to be done to transfer this small +dQ to move towards this positive plate(because it's against the electric field). This work is stored as potential energy. Work done W = charge X potential i.e, W =qV Here charge is dQ so we can write dW = dQ V = dQ Q/C               ( from equation Q = CV ) integrating on both sides we get  This equation consisted to be general equation. By substituting values of Q and C we get other 2 forms of energy stored in capacitor    applying Q = CV in equation (1) applying C = Q/V in equation (1)     Prev      Next You may be Interested In  Physics Previous Question Papers With Answers Browse more topics under Electrostatic Potential & Capacitance

Effect Of Dielectric On A Capacitor     If the dielectric introduces in between the plates, the dielectric get polarized by the electric field. So we have to consider the surface charge densities of dielectric  +  p  and  -   p   Conclusion           We can increase the capacitance of a parallel plate capacitor by introducing dielectric in between the plates. Here K is the dielectric constant, which should be greater than 1.       Prev      Next Previous year question paper with answer key   Browse more topics under Electrostatic Potential & Capacitance Electrostatic Potential, Potential Energy, Potential Energy Difference Potential Due To A Point Charge Potential Due To An Electric Dipole Equipotential Surface & Its Properties Potential Energy In An External Electric Field Potential Energy Due To A Single Charge In An External Electric Field Potential Energy Due To A System Of 2 Charges In An External Electric Field Potential Energy Due To An Electric Dipole In An External

Parallel Plate Capacitor Parallel Plate Capacitor      A parallel plate capacitor consisted of two large conducting plates separated by a small distance. When the battery is connected across the battery, the plates get charged and establish an electric field. The electric field inside the capacitor has a direction from the positive plate to the negative plate.  The capacitance of Parallel Plate Capacitor Without Dielectric  Consider a parallel plate capacitor  of two large conducting plates separated by a small distance d. The area of each plate is A. The distance d is much smaller than area A. so we can write A>>d.  To find the capacitance there are 3 steps to follow, first we want to find the electric field E , then the potential V and finally capacitance C using equation C=Q/V  E → V →C=   Q/V For finding the total electric field divided the entire area into 3, region 1, region 2 & region 3 like this. Electric field in region 1, is the sum of EF due to positive plate and E

NCERT Solutions For Class 12 Maths Chapter 1  Relations & Functions Miscellaneous Exercise   NCERT Solutions For Class 12 Mathematics Chapter 1 Relations & Functions Miscellaneous Exercise. All NCERT solutions based on the latest syllabus 2020 are available to download as well Miscellaneous Exercise You may be interested in  Exercise 1.1    Exercise 1.2    Exercise 1.3    Exercise 1.4 Miscellaneous Exercise  

Class 12 Maths Chapter 1 Relations And Functions Notes Free PDF download for Plus Two Maths revision notes and short key-notes to score more marks in your exams. NCERT Solutions For Class 12 Mathematics Chapter 1 Relations & Functions We will provide you NCERT solutions from Exercise 1.1 to Miscellaneous. Read on to find out.    Exercise 1.1 Exercise 1.2 Exercise 1.3 Exercise 1.4 Miscellaneous Exercise   NCERT Solutions For Class 12 Mathematics Chapter 1 Relations & Functions. All NCERT Solutions based on the latest syllabus 2020 are available to download as well as view online

NCERT Solutions For Class 12 Maths Chapter 1  Relations & Functions Exercise 1.3 NCERT Solutions For Class 12 Mathematics Chapter 1 Relations & Functions Exercise 1.3. All NCERT solutions based on the latest syllabus 2020 are available to download as well Exercise 1.3 You may be interested in  Exercise 1.1    Exercise 1.2    Exercise 1.3    Exercise 1.4 Miscellaneous Exercise