unimore/triennale-appunti-steffo
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do stuff

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Steffo 2019-12-06 16:31:06 +01:00
parent 4d5df994c6
commit 809302fedd
17 changed files with 9416 additions and 5 deletions
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src/pages/fisica.js
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@ -75,6 +75,22 @@ export default class Fisica extends Component {
Produce il modulo della proiezione di <Latex>{r`\vec{a}`}</Latex> su <Latex>{r`\vec{b}`}</Latex>.
</p>
</Panel>
<Panel>
<h3>
Prodotto vettoriale
</h3>
<p>
Si chiama vettoriale perchè il risultato è un altro vettore.
</p>
<ul>
<li><Latex>{r`\vec{c} = \vec{a} \times \vec{b}`}</Latex></li>
<li><Latex>{r`\left | \vec{c} \right | = \left | \vec{a} \right | \cdot \left | \vec{b} \right | \cdot \sin(\alpha)`}</Latex></li>
<li><a href="https://it.wikipedia.org/wiki/Regola_della_mano_destra">Regola della mano destra</a></li>
</ul>
<p>
Non è commutativo!
</p>
</Panel>
</Split>
<h2>
Leggi di Newton
@ -966,10 +982,10 @@ export default class Fisica extends Component {
Amperometro
</h3>
<p>
Misura la corrente elettrica se messo in serie al componente da misurare.
Misura la corrente elettrica se messo in serie.
</p>
<p>
(Funzionamento: ha una resistenza interna bassisima che non influisce significativamente sulla corrente.)
(Funzionamento: ha una resistenza interna bassisima in modo da non influire significativamente sulla corrente.)
</p>
</Panel>
<Panel>
@ -977,7 +993,10 @@ export default class Fisica extends Component {
Voltmetro
</h3>
<p>
<Todo>Cos'è?</Todo>
Misura la differenza di potenziale se messo in parallelo.
</p>
<p>
(Funzionamento: ha una resistenza altissima in modo da non influire significativamente sulla tensione.)
</p>
</Panel>
</Split>
@ -990,7 +1009,7 @@ export default class Fisica extends Component {
Legge dei nodi
</h3>
<p>
<Todo>Cos'è un nodo?</Todo>
Per nodo si intende un qualsiasi punto del circuito.
</p>
<p>
Da un nodo entra ed esce la stessa corrente.
@ -1001,7 +1020,7 @@ export default class Fisica extends Component {
Legge delle maglie
</h3>
<p>
<Todo>Cos'è una maglia?</Todo>
Per maglia si intende un qualsiasi percorso chiuso all'interno del circuito.
</p>
<p>
In una maglia chiusa, la somma delle differenze di potenziale è 0.
@ -1089,6 +1108,104 @@ export default class Fisica extends Component {
</p>
</Panel>
</Split>
<h2>
Magnetismo
</h2>
<Split>
<Panel>
<h3>
Campo magnetico
</h3>
<p>
Come un campo elettrico, ma per i magneti.
</p>
<p>
<Latex>B</Latex>
</p>
<p>
La sua unità di misura è il Tesla (<Latex>T</Latex>).
</p>
</Panel>
<Panel>
<h3>
Flusso magnetico
</h3>
<p>
Come il flusso elettrico, ma per campi magnetici.
</p>
</Panel>
<Panel>
<h3>
Legge di Gauss per il magnetismo
</h3>
<p>
Il flusso magnetico attraverso qualsiasi superficie chiusa è sempre nullo.
</p>
</Panel>
</Split>
<Split>
<Panel>
<h3>
Forza magnetica su carica puntiforme
</h3>
<p>
<i>Anche detta <b>forza di Lorentz</b>.</i>
</p>
<p>
I campi magnetici applicano una forza sulle cariche vicine:
</p>
<p>
<Latex>{r`\vec{F}_{magnetica} = q \cdot (\vec{v} \times \vec{B})`}</Latex>
</p>
<p>
Dove <Latex>{r`\vec{B}`}</Latex> è l'intensità del campo magnetico e <Latex>{r`\vec{v}`}</Latex> la velocità della carica considerata.
</p>
<p>
Si ha una forza massima se la velocità è perpendicolare al campo magnetico.
</p>
<p>
In un campo magnetico uniforme, una velocità perpendicolare al campo porta alla creazione di un moto circolare uniforme.
</p>
</Panel>
<Panel>
<h3>
Forza magnetica in un filo
</h3>
<p>
I campi magnetici influenzano anche le cariche presenti in un conduttore:
</p>
<p>
<Latex>{r`\vec{F} = I \cdot (\vec{L} \times \vec{B})`}</Latex>
</p>
</Panel>
</Split>
<h2>
Campi magnetici
</h2>
<Split>
<Panel>
<h3>
Campo magnetico in una spira
</h3>
<p>
Una spira in cui passa corrente produce un campo magnetico perpendicolare al piano creato dalla spira.
</p>
</Panel>
<Panel>
<h3>
Campo magnetico di un solenoide
</h3>
<p>
Un solenoide sono tante spire avvolte in modo da formare una specie di cilindro.
</p>
<p>
All'interno del solenoide si crea un campo (quasi) uniforme:
</p>
<p>
<Latex>{r`B = \mu_0 \cdot I \cdot \frac{A_{vvolgimenti}}{L_unghezzafilo}`}</Latex>
</p>
</Panel>
</Split>
</div>
)
}