Informe experimental sobre la reproducción de la frecuencia de resonancia de resonadores de Helmholtz caseros.
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Descripción: bobina
Deskripsi lengkap
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informe sobre bobinas de helmholtzDescripción completa
Description : Optique
and finding its reduction factor.
Trisha Banerjee Banerjee @ 2010
Trisha Banerjee Banerjee @ 2010
A helmholtz galvanometer , like other galvanometers , is an instrument which can be use to measure dc current in the circuit. It is an improved form of the tangent galvanometer . It consists of two equal coils placed coaxially at a distance equal to the radius of the either coil . The two coils are of the same radius on the same direction. The field at any point on the axis of the coil coil is equal to the the sum of the magnetic field due to the individual coil. it consists of two identical circular coils , each having several hundred turns in it, mounted coaxially at a distance dista nce equal to their radius. In the side of each coil coil , four terminals terminals are provided provided . First of which is internally internally connected with the starting end of the coil coil , second is connected connected with the end of the second turn , third with the end of the 50 th turn and fourth with the 500th turns. Wit the help of these terminals , equal number of turns of each coil coil can be connected in series to allow the same current to flow f low in the same direction. Trisha Banerjee Banerjee @ 2010
Two coils of same radii
Axis and distance is measure in one direction.
Trisha Banerjee Banerjee @ 2010
Magnetic needle
Trisha Tr isha Banerjee Banerjee @ 2010
A cir cular cular disc with wit h a calibra calibr at ed scale scale in de degr greees on it is mount mount ed at t he mid point point of tthe he common ax axis is of t he coils coil s .A .A small magne magnett ic ne neeedle wi witt h a po point inter er at attt ached ached is capable capable of r otation otat ion in the ho horr izontal izontal plane plane .t he disc is cove coverr ed wit withh a plane plane glass t o av avoid oid distur dist urba bance nce f r om ou outt side . The herr e ar aree leveli leveling ng scr ews ar ar e also also prov pr ovided ided t o mak make the t he plane plane of t he disc horiz hor izon ontt al.
To find find the the redu reduct ctio ion n fact factor or of a Helm Helmho holt ltzz galv galvano anome mete terr.
Helmh Helmholt oltzz galva galvanome nomete terr , batt battery ery , rheos rheostat tat , commut commutat ator or , ammete ammeterr .
Circuit diagram……
Trisha risha Baner Baner ee @2010 @2010
Procedure:-
a) Lev evel el the t he box box of helmholt helmholtzz ga galva lvano nome mett er an andd see t ha hatt magne magnett ic needle needle is fr ee t o rrotate otate in the t he ho horr izon izontt al plan plane. e. b) Put the t he coil of the t he ga galva lvano nome mett er in the maga magane nett ic meridia mer idiann . c) Mak akee the conne connect ction ion as shown shown in the t he figur figur e. Allow some some cur r en entt t o pass pass in the t he galv galvan anome omett er in one dir dir ect ection ion an andd obser observe ve t he deflect deflection ion of t he pointer po inter . N Now, ow, r ev ever erse se t he curr cur r ent with wit h the help help of com c ommu mutat tator or an andd see see t he de deflflection ection . If it is not equal equal to t o prev pr eviou iouss one one , r otate otat e t he coils suitab suit able le t ill de deflflect ection ion du duee to dir ect and r ev ever erse se are ar e eq equa ual.l. Adjust djust the t he r he heostat ostat to to get a def def lection lect ion of 45 degree degr ee.. Now take out the t he plug t o make make cur r en entt zero. d) Now move move the dist distan ance ce fr om the dial dial in a one one dir direct ection ion an andd see t he deflection, de flection, an andd nnote ote the t he curr cur r en entt fr om amme ammett er ev ever eryy time t ime..
Trisha Banerjee Banerjee @2010 @2010
Precaution:-
a)
The coil coi l should be in magne magnett ic meridi mer idian an..
b) No magn magneet ic mat mat er ials and curr cur r ent ca carr r ying ying condu conduct ctor orss should should no nott be br brou ough ghtt ne neaar t he app ppaar at us.
