Types of electrotherapeutic current (unit 6)
1. Types of electrotherapeutic current :- There are three types of current used in electrotherapeutic purpose:-
Direct current.
Alternating current.
Pulsed current/ pulsatile current.
2. Characteristic features of electrotherapeutic current:- Wave Form:-
The shape of the single pulse or cycle phases as they appear on the graph of current (voltage) versus time is called wave form.
Mainly two types of characteristics are used to describe pulsed and alternating current wave forms:-
Descriptive (qualitative) characteristics.
Quantitative Characteristics.
3. Current modulations:- Changes in current characteristics may be sequential, intermittent or variable in nature and are referred to as modulations.
Amplitude modulation:- Variations in peak amplitude of a series of pulses.
4. Burst Current:- A finite series of pulses, a finite interval of alternation current delivered at a specific frequency over a specific time interval.
Burst duration (with interruption).
Inter burst interval (without interruption).
Continuous mode (without interruption).
Types of electrotherapeutic current (unit 6)
1. Types of electrotherapeutic current :- There are three types of current used in electrotherapeutic purpose:-
Direct current.
Alternating current.
Pulsed current/ pulsatile current.
2. Characteristic features of electrotherapeutic current:- Wave Form:-
The shape of the single pulse or cycle phases as they appear on the graph of current (voltage) versus time is called wave form.
Mainly two types of characteristics are used to describe pulsed and alternating current wave forms:-
Descriptive (qualitative) characteristics.
Quantitative Characteristics.
3. Current modulations:- Changes in current characteristics may be sequential, intermittent or variable in nature and are referred to as modulations.
Amplitude modulation:- Variations in peak amplitude of a series of pulses.
4. Burst Current:- A finite series of pulses, a finite interval of alternation current delivered at a specific frequency over a specific time interval.
Burst duration (with interruption).
Inter burst interval (without interruption).
Continuous mode (without interruption).
Ammeter is a low resistance galvanometer
It is used to measure the current in a circuit in amperes
Galvanometer can be converted into an ammeter by using a low resistance wire in parallel with the galvanometer
the resistance of the wire depends upon the range of the ammeter
As shunt resistance is small the combined resistance of the galvanometer & the shunt is very low hence the ammeter has much lower resistance than galvanometer
An ideal ammeter has zero resistance
It is the most common instrument used to measure voltage
It measure either AC or DC voltage
It is a measure of the voltage between two points of an electrical current
Presiunea solidelor. Proiect didactic, Clasa a VII-a
Profesor: Meriacre Elena
Lucrare finala elaborată în cadrul cursului e-learning „Didactica Fizicii” pe platforma de colaborare internaționala www.civicportal.org (29.X-25.XII.2012).
Moderator - Viorel Bocancea, conferentiar univeristar, Universitatea de Stat din Tiraspol (cu sediul la Chisinau).
It is a direct current named after inventor Dr.L. Galvani. 2. Its direction of polarity is constant and passing continuously in one direction only, so termed as constant direct current. 3. Because of its unidirectional property, when applied to a muscle tend to contract and remain in that position till it is brought to zero, which seems to be very painful. GALVANIC CURRENT
this contant is physics related.Here AC current explain on the purpose of presentation with some equation and circuit diagram.i thaink it wiil be very effective for the students.
Forta de greutate. Pondera (Greutatea) corpurilorAlianta INFONET
Forţa de greutate. Ponderea (greutatea) corpurilor. Lecţie de fizică in clasa 6.
Autor: Galina Lescic
Lucrare finala elaborată în cadrul cursului e-learning „Didactica Fizicii” pe platforma de colaborare internaționala www.civicportal.org (29.X-25.XII.2012).
Moderator - Viorel Bocancea, conferentiar univeristar, Universitatea de Stat din Tiraspol (cu sediul la Chisinau).
Teoria electricității, ca și a magnetismului, este mult mai recentă decât optica sau mecanica. Mirajul electricității a stârnit imaginația oamenilor încă din antichitate. Se pare că primele studii de electricitate au fost efectuate în sec. al VI-lea î.Cr. de Tales din Milet, care a observat că unele substanțe pot atrage corpuri mai ușoare după ce sunt frecate de alte materiale.
Cyriax, a manual therapy technique, used to treat the soft tissue related pain. invented by James Cyriax who also coined the term "orthopedic medicine". There are various techniques described by Cyriax under the concept which are; infiltration, deep friction massage, manipulation and traction.
this ppt was created by me and i hope it helps to all of you out there. peace
objective : school projects
personal reference
teachers reference
i know its a bit lengthy but im 100% sure it will be helpful
plz leave a like
thxs
Ammeter is a low resistance galvanometer
It is used to measure the current in a circuit in amperes
Galvanometer can be converted into an ammeter by using a low resistance wire in parallel with the galvanometer
the resistance of the wire depends upon the range of the ammeter
As shunt resistance is small the combined resistance of the galvanometer & the shunt is very low hence the ammeter has much lower resistance than galvanometer
An ideal ammeter has zero resistance
It is the most common instrument used to measure voltage
It measure either AC or DC voltage
It is a measure of the voltage between two points of an electrical current
Presiunea solidelor. Proiect didactic, Clasa a VII-a
Profesor: Meriacre Elena
Lucrare finala elaborată în cadrul cursului e-learning „Didactica Fizicii” pe platforma de colaborare internaționala www.civicportal.org (29.X-25.XII.2012).
Moderator - Viorel Bocancea, conferentiar univeristar, Universitatea de Stat din Tiraspol (cu sediul la Chisinau).
It is a direct current named after inventor Dr.L. Galvani. 2. Its direction of polarity is constant and passing continuously in one direction only, so termed as constant direct current. 3. Because of its unidirectional property, when applied to a muscle tend to contract and remain in that position till it is brought to zero, which seems to be very painful. GALVANIC CURRENT
this contant is physics related.Here AC current explain on the purpose of presentation with some equation and circuit diagram.i thaink it wiil be very effective for the students.
Forta de greutate. Pondera (Greutatea) corpurilorAlianta INFONET
Forţa de greutate. Ponderea (greutatea) corpurilor. Lecţie de fizică in clasa 6.
Autor: Galina Lescic
Lucrare finala elaborată în cadrul cursului e-learning „Didactica Fizicii” pe platforma de colaborare internaționala www.civicportal.org (29.X-25.XII.2012).
Moderator - Viorel Bocancea, conferentiar univeristar, Universitatea de Stat din Tiraspol (cu sediul la Chisinau).
Teoria electricității, ca și a magnetismului, este mult mai recentă decât optica sau mecanica. Mirajul electricității a stârnit imaginația oamenilor încă din antichitate. Se pare că primele studii de electricitate au fost efectuate în sec. al VI-lea î.Cr. de Tales din Milet, care a observat că unele substanțe pot atrage corpuri mai ușoare după ce sunt frecate de alte materiale.
Cyriax, a manual therapy technique, used to treat the soft tissue related pain. invented by James Cyriax who also coined the term "orthopedic medicine". There are various techniques described by Cyriax under the concept which are; infiltration, deep friction massage, manipulation and traction.
this ppt was created by me and i hope it helps to all of you out there. peace
objective : school projects
personal reference
teachers reference
i know its a bit lengthy but im 100% sure it will be helpful
plz leave a like
thxs
1. Mărimi scalare, Mărimi vectoriale, Forţa, Vectori, Reprezentarea forţei
Mărimi scalare
O mărime fizică este scalară dacă în raport cu o unitate de măsură este deplin caracterizată
prin valoarea numerică.
Exemple de mărimi scalare
– lungimea, aria, volumul, masa, temperatura, durata.
Mărimi vectoriale
Mărimea fizică deplin caracterizată de modul (valoare numerică), direcţie şi sens se numeşte
mărime vectorială.
Exemple de mărimi vectoriale
– forţa, deplasarea, viteza.
Forţa
Forţa este mărime vectorială.
O forţă este caracterizată de:
– punct de aplicaţie – punctul în care acţionează forţa
– valoare numerică (modul) – exprimată în newtoni
– direcţie – dreapta pe care acţionează forţa (sau orice dreaptă paralelă cu ea)
– sens – în care acţionează forţa.
2. Vectori
Un segment pe care s-a fixat un sens se numeşte vector.
Un vector [AB] este determinat de:
– origine (punctul A)
– direcţie (dreapta d)
– sens (de la A la B)
– modul (lungimea AB).
Reprezentarea forţei
A reprezenta o forţă înseamnă a desena vectorul forţă (F).
Pentru a reprezenta o forţă, printr-un vector forţă, trebuie să parcurgi următoarele etape:
1. Fixezi punctul de aplicaţie (originea vectorului)
2. Desenezi o dreaptă, prin punctul de aplicaţie, care reprezintă direcţia forţei
3. Stabileşti sensul vectorului, în funcţie de sensul forţei
4. Determini lungimea vectorului, alegând o scară convenabilă, în funcţie de modulul forţei
5. Desenezi vectorul forţă, vârful săgeţii indicând sensul forţei
6. Notezi vectorul forţă prin simbolul F.