NCCER 26201-20 ALTERNATING CURRENT QUESTIONS AND ANSWERS FULLY SOLVED

NCCER 26201-20 ALTERNATING CURRENT QUESTIONS AND ANSWERS FULLY SOLVED An electric current always produces ? A magnetic field The number or cycles an alternating electric current undergoes per second is known as ? Frequency What is the peak voltage in a circuit with an RMS voltage of 120 VAC ? 170 VAC Wich of the following conditions exist in a circuit of pure resistance ? The voltage and current are in phase In a purely resistive AC circuit where 240v is applied across a 10 ohm resistor, the amperage is ? 24A When the current increases in an AC circuit, what role does inductance play ? It reduces the current Which of the following coils is likely to show the lowest inductance? A coil with a narrow coil Which of the following conditions exists in a circuit of pure inductance? The voltage and current are 90 degrees out of phase Reactance increases with an increase in? Inductance Capacitance is measured in ? Farads The total capacitance of two 15uf capacitors connected in parallel is? 30uf The total capacitance of two 15uf capacitors connected in series is? 15uf The total capacitance of two 5uf capacitors and on 10uf capacitor in parallel is? 20uf The opposition to current flow offered by the capacitance of a circuit is known as ? Capacitive resistance The total opposition to current flow in an AC circuit is known as ? Impedance The true power in a circuit with 4A through a 50ohm resistor is ? 200w The power factor in a circuit with a resistance of 50 ohm and an impedance or 100 ohm is ? .5 A power factor is not an angular measure, but a numerical ratio with a value between 0 and 1, equal to the ? Cosine of the phase angle. The two windings of a conventional transformer are known as the ? Primary and secondary windings.