Find whether the grounded neutral conductor is allowed to be buried directly in the ground.

Question

12.38 If the circuit shown in Fig. P12.38(a) is excited by the current waveform is(t) shown in Fig. P12.38(b), determine i(t) for 1 > 0, given that R₁ = 102, R2 = 5 92, and C = 0.02 F. is(t) R₁ i(t) R₂ is(t) 1.5 A 1.5A | 1 A 0.5 A- M 0.5A- (a) Circuit www. (b) Waveform 0 = 4 rad/s t Figure P12.38 Circuit for Problems 12.38 to 12.40.

Answer 1

Question

Chapter 27, Problem 13R

a.

To determine

Find whether the grounded neutral conductor is allowed to be buried directly in the ground.

b.

To determine

Find the NEC article that provides the statement given in Part a.

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12.38 If the circuit shown in Fig. P12.38(a) is excited by the current waveform is(t) shown in Fig. P12.38(b), determine i(t) for 1 > 0, given that R₁ = 102, R2 = 5 92, and C = 0.02 F. is(t) R₁ i(t) R₂ is(t) 1.5 A 1.5A | 1 A 0.5 A- M 0.5A- (a) Circuit www. (b) Waveform 0 = 4 rad/s t Figure P12.38 Circuit for Problems 12.38 to 12.40.

EXERCISE 1: Consider the waveguide of Example Calculate the phase constant, phase velocity and wave impedance for TE10 and TM11 modes at the operating frequency of 15 GHz. = 192.4 . For Answer: For TE10, B = 615.6 rad/m, u = 1.531 × 108 m/s, TE 529.4 rad/m, u = 1.78 x 10 m/s, TM = 158.8 Q. TM11, B Example 1: A rectangular waveguide with dimensions a = 2.5 cm, b = 1 cm is to operate below 15.1 GHz. How many TE and TM modes can the waveguide transmit? if the guide is filled with a medium characterized by σ = 0, &=4&o Hr = 1° Calculate the cutoff frequencies of the modes.

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