PARALLAX METHOD – – Parallax method has been used for measuring distance of stars which are less than 100 light years away.(parallax is the name given to change in the position of an object with respect to the back ground , when the object is seen from the two different positions .) The diameter AB […]
Define 1 Ampere This topic only explain the term definition of Ampere ( which is explain in different-different type . Students can learn it according to there needs. ) Ampere is the basic unit of electric current . It is named after Andre-Marie -Ampere a French scientist born in 1775 . He also known as […]
ELECTRIC CURRENT or CURRENT ELECTRICITY electric current – Electric current – When electric charges is in motion , they constitute what is called an electric current . electric current is defined as the rate of flow of charge through an area of the conductor . if Q is the charge flows through a conductor […]
SELF-INDUCTION OF LONG SOLENOID SELF-INDUCTION OF LONG SOLENOID this topic is important for the class 12th board examination Self-inductance of long air-cored solenoid question may asked as – what do you mean by the term self-induction ? Find expression for the self-inductance of long air cored solenoid . Self-inductance of long air-cored solenoid – Suppose […]
Explain the term self-induction of a coil Self – Induction – It is the property of an electric circuit or coil by virtue of which it opposes any change of flux or current in it by inducing a current in itself is called self- induction. In another words we can say “self-induction is the inertia […]
What is electric current What is electric current ? what is its unit ? define Ampere. Electric current-When electric charges is in motion , they constitute what is called an electric current . electric current is defined as the rate of flow of charge through an area of the conductor . if Q is the […]
Faraday’s law of electromagnetic induction Electromagnetic induction – As we know when electric current passes through a conductor then magnetic field developed across the conductor , first discovered by Oersted . But Michael Faraday found its converse is also possible i.e. Whenever magnetic field changes around a coil ( and hence magnetic flux linked across […]
Assignment for short answer type questions of electromagnetic induction and alternating current this Assignment for short answer type questions of electromagnetic induction and alternating current contain all short type questions which is important for board examination of class 12th SHORT ANSWER TYPE QUESTIONS. Q1. In a series LCR circuit, obtain the conditions under which (i)the […]
Assignment of electromagnetic induction and alternating current This assignment of electromagnetic induction and alternating current contain long answer type questions ( derivation and reasoning type questions. ) LONG ANSWER TYPE QUESTIONS OF ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT Q1. Explain with the help of a labelled diagram, the principle and working of an ac generator. Write […]
USES OF POTENTIOMETER Uses of potentiometer – Measurement of emf of cell- Let , E is the emf of driver cell and , E1 is the emf of cell to be measured Here potential gradient K= [ {E / (R+r)} r]/l . Let l1 is the length of the wire from […]