Theory A2-1 Italiano (Italy) Lenti elettrostatiche (10 punti) Parte A. Il potenziale elettrostatico sull’asse dell’anello. (1 punto) A.1 (0.3 pt)
) =
A.2 (0.4 pt)
)
A.3 (0.2 pt)
F(z) =
Cerchia la risposta corretta: q< 0 o q> 0. A.4 (0.1 pt)
ω=
Parte B. Potenziale elettrostatico nel piano dell’anello (1.7 punti) B.1 (1.5 pt)
β=
B.2 (0.2 pt)
F(r) =
Cerchia la risposta corretta: q< 0 o q> 0. Parte C. La lunghezza focale della lente elettrostatica idealizzata: processo di carica istantanea (2.3 punti) C.1 (1.3 pt)
f=
Theory A2-2 Italiano (Italy) C.2 (0.8 pt)
c=
C.3 (0.2 pt)
Cerchia la risposta esatta. L’equazione delle lenti sottili è: valid or not valid. Parte D. L’anello come condensatore (3 punti) D.1 (2.0 pt)
C=
Theory A2-3 Italiano (Italy) D.2 (1.0 pt)
Per 2v< t< d 2v, q(t) =
Per t> d 2v, q(t) =
q0 =
Carica sull’anello come funzione del tempo: Parte E. Lunghezza focale di una lente più realistica: processo di carica non istantanea (2 punti) E.1 (1.7 pt)
f=
Theory A2-4 Italiano (Italy) E.2 (0.3 pt)
qeff =
Topic: Electrostatics, Oscillations & Waves, Geometric Optics Metodi: Coulomb’s Law, Electric Potential Method, Approximation & Series Expansion, Simple Harmonic Motion Analysis, Calculus-Integration, Thin Lens & Mirror Equation Competenze: Mathematical Modeling, Physical Reasoning, Diagrammatic Reasoning Objects: Lens, Capacitor Fonte: Testo (PDF) — p.1 Soluzione: Soluzioni (PDF)
Theory A2-1 Italian (Italy) The following table shows the results of the calculations: Part A. The electrostatic potential on the ring axis. (a) the number of days A.1 (0.3 pt)
) =
A.2 (0.4 pt)
)
A.3 (0.2 pt)
F(z) =
Look for the right answer: q< 0 o q> 0. A.4 (0.1 pt)
ω=
Part B. Electrostatic potential in the plane of the ring (1.7 points) B.1 (1.5 pt)
β=
B.2 (0.2 pt)
F(r) =
Look for the right answer: q< 0 o q> 0. Part C. The focal length of the idealized electrostatic lens: instantaneous charging process (2.3 points) C.1 (1.3 pt)
f=
Theory A2-2 Italian (Italy) C.2 (0.8 pt)
c=
C.3 (0.2 pt)
Look for the right answer. The thin-lens equation is: valid or not valid. The following is the list of the following: The ring as a condenser (3 points) D.1 (2.0 pt)
C=
Theory A2-3 Italian (Italy) D.2 (1.0 pt)
For 2v< t< d 2v, q(t) =
For t> d 2v, q(t) =
q0 =
Load on the ring as a function of time: Part E. The focal length of a more realistic lens: non-instant loading process (2 (point) E.1 (1.7 pt)
f=
Theory A2-4 Italian (Italy) E.2 (0.3 pt)
What is this?
Topic: Electrostatics, Oscillations & Waves, Geometric Optics Metodi: Coulomb’s Law, Electric Potential Method, Approximation & Series Expansion, Simple Harmonic Motion Analysis, Calculus-Integration, Thin Lens & Mirror Equation Competenze: Mathematical Modeling, Physical Reasoning, Diagrammatic Reasoning Objects: Lens, Capacitor Fonte: Testo (PDF) — p.1 Soluzione: Soluzioni (PDF)