SELF-INDUCTION

self- induction

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… Continue reading SELF-INDUCTION

Faraday’s law of electromagnetic induction

Faraday's law of EMI

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… Continue reading Faraday’s law of electromagnetic induction

USES OF POTENTIOMETER

POTENTIOMETER USE-1

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… Continue reading USES OF POTENTIOMETER

POTENTIOMETER

POTENTIOMETER

POTENTIOMETER THIS TOPIC EXPLAIN ABOUT THE POTENTIOMETER  Potentiometer – An instrument used to measure accurately the EMF or potential difference is called potentiometer. Principle– Its working based on the principle that the potential drop across a conductor is directly proportional to the length of the conductor , if constant current passes through the conductor having… Continue reading POTENTIOMETER

MOVING COIL GALVANOMETER

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In moving coil galvanometer we will learn about the working theory of a galvanometer and its conversion from galvanometer to ammeter and voltmeter To read the complete topic click here- Moving Coil Galvanometer

CYCLOTRON

electromagnetic induction

CYCLOTRON In this topic we will, discuss about working of cyclotron , its principle, construction and its limitations.  (** this topic is removed from the syllabus of class 12th, board examination).To know the complete syllabus click on the given link- Before to know about the cyclotron students must know  Force Acting on a Charge Particle… Continue reading CYCLOTRON

Biot-Savart’s law

Biot-Savart's law

State and explain Biot-Savart’s law In this topic we will discuss about Biot-savart’s law and magnetic field at a point due to finite current carrying wire or conductor. Biot- Savart law – Biot-Savart’s law explain the magnetic field due to small current carrying element As we know , whenever the current passes through a conductor… Continue reading Biot-Savart’s law

What is Ampere circuital law

Ampere circuital law – After the discovery of Oersted and Biot-Savart, Ampere found a useful relation between magnetic field and electric current.     [ In the case of all basic laws of physics , Ampere’s law can’t be derived , its validity is based on the correctness of the result.] . According to Ampere circuital law… Continue reading What is Ampere circuital law