1.A pure inductive coil is connected to a 250 V, 50 Hz AC supply and is reported to consume 100 W of power. What is the reason for this power consumption?
2.Why does an iron-cored choke exhibit a higher effective resistance than its actual resistance when operating at standard supply frequency?
3.What is the term used for the ratio of active power to apparent power?
4.An AC circuit has an apparent power of 10 kVA and an active power of 8 kW. What is the reactive power in this circuit?
5.What happens to a parallel AC circuit when it reaches resonance?
6.Why is laminated iron commonly used in alternating current (AC) circuits?
7.Which of the following is NOT a correct definition of the power factor in a series R-L-C circuit?
8.In a parallel resonance circuit, what quantity is primarily amplified?
9.Why are wire-wound resistors not recommended for applications involving high-frequency signals?
10.Which characteristic applies exclusively to resistors?
11.What does a phasor represent in electrical engineering?
12.What does capacitive susceptance represent in an electrical circuit?
13.If two alternating waves have the same frequency, what is the phase difference when one wave reaches its peak while the other wave crosses zero?
14.In a parallel resistor-capacitor (R-C) circuit, how does the current relate to the applied voltage?
15.Which statement correctly describes a characteristic of a parallel electrical circuit?
16.At which interval is the slope of a sine wave constant?
17.In an alternating current (AC) circuit, where does power loss primarily occur?
18.At which frequency range does the skin effect typically manifest in a conductor carrying current?
19.In which of the following is power commonly expressed using decibels?
20.At which frequency range does a parallel R-L circuit exhibit purely resistive behavior?