50001. The power factor indicates how much of the apparent power is reactive power.
50002. A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.
50003. In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.
50004. The impedance of an RL circuit varies inversely with frequency.
50005. The phase angle (θ) of a series RL circuit varies directly with frequency.
50006. In an RL circuit, part of the power is resistive and part is reactive.
50007. The amount of moisture in a food at the end of the constant rate period of drying
50008. A 1.5 k resistor and a coil with a 2.2 k inductive reactance are in series across an 18 V ac source. The power factor is
50009. The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is
50010. In a series RL circuit, 12 V rms is measured across the resistor, and 14 V rms is measured across the inductor. The peak value of the source voltage is
50011. Referring to Problem 18, the circuit impedance is
50012. To increase the current in a series RL circuit, the frequency
50013. SAMSOE means
50014. In FSSA,-----------categories of microbilogical quality have been assigned based on the mirobiological parameters
50015. The method of pasteurization carried out in the tubular heat exchanged with three concentrated tubes
50016. SS-304 contains-------------% Nickel
50017. In a cream separator the angle of inclination of disk to the horizontal is
50018. The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02 F, and RW = 90 is
50019. A 6.8 k resistor, a 7 mH coil, and a 0.02 F capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 . The equivalent parallel resistance, Rp(eq), is
50020. Referring to Problem 20, what is the total parallel resistance (Rp(tot))?
50021. A 200 resistor, a coil with 30 of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance
50022. Referring to Problem 8, the total current is
50023. If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth
50024. A 90 resistor, a coil with 30 of reactance, and a capacitor with 50 of reactance are in series across a 12 V ac source. The current through the resistor is
50025. A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is
50026. If the value of C in a series RLC circuit is decreased, the resonant frequency
50027. A 24 resistor, an inductor with a reactance of 120 , and a capacitor with a reactance of 120 are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is
50028. To tune a parallel resonant circuit to a higher frequency, the capacitance should be
50029. In a certain series resonant circuit, VC = 125 V, VL = 125 V, and VR = 40 V. The value of the source voltage is
50030. A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will
50031. A 9 mH coil is in parallel with a 0.015 F capacitor across an 18 kHz ac source. The coil's internal resistance, RW, is 60 . The circuit impedance is
50032. A 15 resistor, an inductor with 8 inductive reactance, and a capacitor with 12 capacitive reactance are in parallel across an ac voltage source. The circuit impedance is
50033. A certain series RLC circuit with a 200 Hz, 15 V ac source has the following values: R = 12 , C = 80 F, and L = 10 mH. The total impedance, expressed in polar form, is
50034. Resonance is a condition in a series RLC circuit in which the capacitive and inductive reactances are equal in magnitude.
50035. In a series RLC circuit, the larger reactance determines the net reactance of the circuit.
50036. The reactive voltages, VL and VC, cancel at resonance.
50037. The quality factor (Q) is the ratio of true power to apparent power.
50038. In a parallel RLC circuit, the smaller reactance determines the net reactance of the circuit.
50039. In a series RLC circuit, the current is minimum at resonance.
50040. At series resonance, the inductive reactance and capacitive reactance are never equal.
50041. A lower Q produces a narrower bandwidth.
50042. A series resonant circuit is commonly called a tank circuit.
50043. XL and XC have opposing effects in an RLC circuit.
50044. A 10 resistor, a 90 mH coil, and a 0.015 F capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is
50045. In a series RLC circuit that is operating above the resonant frequency, the current
50046. A 15 resistor, a 220 H coil, and a 60 pF capacitor are in series across an ac source. What is the bandwidth of the circuit?
50047. A resistor of 3 k, a 0.05 F capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?
50048. A 12 resistor, a 40 F capacitor, and an 8 mH coil are in series across an ac source. The resonant frequency is