ET 3

A detailed illustration of a spherical capacitor with electric field lines, surrounded by various electric circuit components like resistors, inductors, and capacitors, set in a modern laboratory environment.

Spherical Capacitor and Circuit Theory Quiz

This quiz tests your knowledge on capacitors, electric circuits, and related physics principles. Ideal for students and enthusiasts, it covers various concepts from spherical capacitors to resonant circuits.

10 multiple-choice questions
Test your understanding of electric fields
Explore concepts in capacitance and resonance

9 Questions2 MinutesCreated by ElectroNerd257

The capacitance of the spherical capacitor (the capacitor plates are two metallic spheres, concentric, of radius r_e and r_i, and the dielectric between the spheres has the constant permittivity ε), is:

C = (4*π*ε) *(r_e-r_i) / (r_e * r_i) [F]

C = (2*π*ε*r_e*r_i) / (r_e - r_i) [F]

C = (4*π*ε*r_e*r_i) / (r_e - r_i) [F]

C = (4*π*ε*a*b) / (a-b) [F]

The electric induction of the cylindrical capacitor inside the integration surface Σ, that is also a cylinder, coaxial with the two cylindrical plates of the capacitor, having the radius a and the length d, is:

D = q / (2π * a * d) [C/m*2]

D = q / (2π * r * l) [C/m*2]

D = q / (2π * r * d) [C/m*2]

D = q / (2π * a * l) [C/m*2]

When using the node potential method, which of the affirmation is wrong?

The real currents from the circuit branches are determining by applying the Ohm's Law on each branch

L-n+1 equations will be written

In the written equations, Σlsck represents the sum of the sortcircuit injected in node k by sources from the adjacent branches to this node (k)

A reference node is chosen, preferable the N-th node

In an electric circuit, the resonance pulsation, ω:

Depend only of L and C

Depend of R, L, C

Depend only of R

Depend only of R and L

At the R, L, C series resonance

The total absorbed current has the maxim value

No correct option

Voltage drop on the coil = voltage drop on condenser

The current has the maxim value

Voltage drop on coil = voltage drop on resistance

Spherical Capacitor and Circuit Theory Quiz

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