SureDen
Faraday connected a coil to a galvanometer and brought a magnet close to the coil or took it away form the coil. In both the case he observed deflection in the galvanometer.
EMF can be induced by every that mean is which flux linked with the conductor became varying.
EMF induced in a straight conductor moving in the magnetic field.
φ =BA
Consider a coil connected to a battery through a key. When the circuit is switched on the current starts growing through the coil and very soon acquires its maximum value. Duri
Whenever a large conductor i.e. 2 dimension or 3 dimension conductor in placed in varying magnetic field an EMF is induced in it due to the find closed paths within concentric circular currents known as eddy currents.
Eddy currents by nature are con
PRE Board E
Cells in series :
Whenever the primary circuit is switched on or off deflection is observed in the secondary circuit. At the time of switching on or the circuit the current in primary various wh
Hertz produced and detected EM Waves experimentally.
Experimental setup is as shown below.
It is a device which works on AC. It is used to increase as decrease the magnitude of alternate voltage as alternating current.
Principle :-
Electromotive force:- the emf of a source is defined as the work done by the source in taking a unit positive charge from its lower po
Potentiometer: A potentiometer is a device to measure an unknown emf or potential difference accurately.
Construction: a potentiom
Commercial cells
1. Primary cell: - Those in which the reaction taking place cannot be reversed. So cell can’t be recharged.
1.The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents.
Nerst equation of electrode potential (Effect of electrolyte constrictions T)
Electrode potential is said to be standard electrode potential if mea
Cell potential or E.M.F of a cell
An electrochemical cell is made up of 2 half cell. One of these act as anode on which oxidation takes place has h
Internal resistance : the resistance offered by the electrolyte of a cell to the flow of current between its electrolyte of a cell to the flow of current betw
Kirchoff’s first Law or Junction Rule : In an electric circuit, the algebraic sum of currents at any junction is zero.
Or the sum of currents
Wheat stone Bridge: it is an arrangement of four resistances used to determine one of these resistances quickly and accurately in terms of remaining three res
Heating effect of current: the phenomenon of the production of heat in a resistor by the flow of electric current through it is called heati
Relation between Gibb’s free energy and EMF of cell
ΔG°= -nFE°cell
Fuel cells:- Cells which can convert energy produced during the confusion of fuels directly into electrical energy. Fuel can be hydrogen, methane, methanol et
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