In a circuit characterized by high capacitance, what occurs to the__________?
Show answer Hide answer
Answer: C. reactive power is more than the actual power
Explanation
Capacitive circuits with low resistance generate high reactive power relative to real power. Capacitors store and release electrical energy, contributing large reactive volt-amperes. Low resistive losses mean active power consumption remains minimal compared to reactive storage. Capacitive reactance dominates circuits featuring large capacitance values and low resistance. Reactive power represents the rate of energy exchange in reactive circuit components. Power triangle relationships balance active, reactive, and apparent power vectors.
Leading power factors in capacitive networks require careful reactive power management. Power system engineers analyze reactive power flows to maintain grid stability. Capacitor banks inject reactive power into power grids to offset inductive loads. Apparent power equals actual power only when circuit reactance is completely zero. Reactive power cannot exceed total apparent power in standard electrical networks. Active power exceeds reactive power only in highly resistive, low-capacitance circuits.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. For a sine wave featuring a peak value of Imax, what is its r.m.s. value_______?
Show answer Hide answer
Answer: B. 0.707
The root mean square value of a sine wave equals one divided by the square root of two. One divided by the square root of two equals approximately zero point seven zero seven. RMS calculations determine the effective hea...
Q2. In a parallel R-C circuit, the current waveform always________the applied voltage?
Show answer Hide answer
Answer: B. leads
In a parallel R-C circuit, the total current leads the applied voltage due to the capacitive branch. The capacitor branch draws a leading reactive current that combines with the in-phase resistive current vectorially. Th...
Q3. In an ideal pure inductive circuit__________?
Show answer Hide answer
Answer: A. actual power is zero
An ideal pure inductor does not contain any resistance to dissipate real power. Active power consumption in a purely reactive component averages out to zero over time. Power flows back and forth between the source and th...
Q4. Within a general R-L-C circuit_________?
Show answer Hide answer
Answer: E. all above are correct
Resistors consume active power calculated as the square of current times resistance. Inductors and capacitors continuously exchange reactive power with the AC supply source. Resistive components dissipate energy as heat...
Q5. In an A.C. circuit, power dissipation takes place specifically within____________?
Show answer Hide answer
Answer: A. resistance only
Power dissipation in an AC circuit occurs exclusively within the resistive components. Resistors convert electrical energy into thermal heat, whereas reactive elements only store and return energy periodically. The avera...
Q6. At the resonant frequency in a series L-C circuit, what happens to the__________?
Show answer Hide answer
Answer: A. current is maximum
At resonance, inductive and capacitive reactances cancel each other out completely. Minimum circuit impedance occurs at resonance in a series RLC network. According to Ohm's law, minimum impedance results in maximum curr...