ET 2

The measurement unit of the electric field intensity is:

C/m

A/m

V/m

The internal resistance of an ideal voltage source has the value equal with

infinite

any value

the source value

zero

In the R, L, C parallel circuit we know R = 5[Ω], L = 10[mH] and C = 1[μF]. The resonance frequency, fr, of the circuit will be:

fr = 1592 [Hz]

fr = 15 [kHz]

fr = 150 [Hz]

fr = 628 [mHz]

In using the analogy between the electrostatic field and the electro-kinetic field which of the analogies is incorrect:

To calculate the electric resistance using the direct method we use the relation:

The resistance of the spherical capacitor (the capacitor plates are two metallic spheres, concentric, of external radius a and internal radius b, and the dielectric between the spheres has the constant permitivitty ε and constant resistivity ρ), is:

R = ρ / (4π ) * (a-b) / (r_i*r_e), [Ω]

R = ρ / (4π ) * (a-b) / (a*b), [Ω]

R = ρε / (4π ) * (a-b) / (a*b), [Ω]

R = ρ / (4π ) * (r_e-r_i) / (r_i*r_e), [Ω]

The volume charge density is defined as:

The reactance of the circuit is:

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