Question 1

An ac power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100000 V by an ideal transformer and the energy is transmitted through a long distance power line which has a resistance of 100 ohms. What percentage of the power delivered by the generator is dissipated as heat in the long-distance power line?

Accepted Answer

The answer of An ac power generator produces 50 A...

Question 2

Which of the following is true about a diode?

Accepted Answer

A diode has high resistance in one current direction (known as reverse bias) and low resistance in the opposite current direction (known as forward bias). Option A is incorrect as a diode does not cause the voltage to shift in phase by 90°. Option C is incorrect as a diode does not require a transformer to function. Option D is incorrect as not all filter circuits contain a diode.

Question 3

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt), the current through the inductor, I_L, is

Accepted Answer

In a parallel RLC circuit, the current through the inductor leads the current through the resistor by 90 degrees, hence it is represented by a cosine function with a negative sign.

Question 4

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

Accepted Answer

The answer of Suppose the circuit parameters in a series...

Question 5

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

Accepted Answer

The answer of A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF...

Quiz 33: Alternating-Current Circuits

Which of the following is true about a diode?

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt) , the current through the inductor, I_L, is

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

Quiz 33: Alternating-Current Circuits

Which of the following is true about a diode?

In a parallel RLC circuit, where IR = IR, max sin(ωt) , the current through the inductor, IL, is

Suppose the circuit parameters in a series RLC circuit are: L = 1.00 μH, C = 10.0 nF, R = 100 Ω, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.

A 10.0-Ω resistor, 10.0-mH inductor, and 10.0-μF capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.

In a parallel RLC circuit, where I_R = IR_{, max} sin(ωt) , the current through the inductor, I_L, is