NCCER 26201-20 ALTERNATING
CURRENT
A power factor is not an angular measure, but a numerical ratio with a value between 0 and 1, equal to the ? - Correct
Answer Cosine of the phase angle.
A transformer with 10 turns in the Primary and 2 turns in the secondary has a turns ratio of ? - Correct Answer 5:1
An electric current always produces ? - Correct Answer A magnetic field
Capacitance is measured in ? - Correct Answer Farads
In a purely resistive AC circuit where 240v is applied across a 10 ohm resistor, the amperage is ? - Correct Answer
24A
Reactance increases with an increase in? - Correct Answer Inductance
The number or cycles an alternating electric current undergoes per second is known as ? - Correct Answer
Frequency
The opposition to current flow offered by the capacitance of a circuit is known as ? - Correct Answer Capacitive
resistance
The power factor in a circuit with a resistance of 50 ohm and an impedance or 100 ohm is ? - Correct Answer .5
The total capacitance of two 15uf capacitors connected in parallel is? - Correct Answer 30uf
The total capacitance of two 15uf capacitors connected in series is? - Correct Answer 15uf
The total capacitance of two 5uf capacitors and on 10uf capacitor in parallel is? - Correct Answer 20uf
The total opposition to current flow in an AC circuit is known as ? - Correct Answer Impedance
The true power in a circuit with 4A through a 50ohm resistor is ? - Correct Answer 200w
The two windings of a conventional transformer are known as the ? - Correct Answer Primary and secondary
windings.
What is the peak voltage in a circuit with an RMS voltage of 120 VAC ? - Correct Answer 170 VAC
When the current increases in an AC circuit, what role does inductance play ? - Correct Answer It reduces the current
Which of the following coils is likely to show the lowest inductance? - Correct Answer A coil with a narrow coil
Which of the following conditions exists in a circuit of pure inductance? - Correct Answer The voltage and current are
90 degrees out of phase
Wich of the following conditions exist in a circuit of pure resistance ? - Correct Answer The voltage and current are in
phase
CURRENT
A power factor is not an angular measure, but a numerical ratio with a value between 0 and 1, equal to the ? - Correct
Answer Cosine of the phase angle.
A transformer with 10 turns in the Primary and 2 turns in the secondary has a turns ratio of ? - Correct Answer 5:1
An electric current always produces ? - Correct Answer A magnetic field
Capacitance is measured in ? - Correct Answer Farads
In a purely resistive AC circuit where 240v is applied across a 10 ohm resistor, the amperage is ? - Correct Answer
24A
Reactance increases with an increase in? - Correct Answer Inductance
The number or cycles an alternating electric current undergoes per second is known as ? - Correct Answer
Frequency
The opposition to current flow offered by the capacitance of a circuit is known as ? - Correct Answer Capacitive
resistance
The power factor in a circuit with a resistance of 50 ohm and an impedance or 100 ohm is ? - Correct Answer .5
The total capacitance of two 15uf capacitors connected in parallel is? - Correct Answer 30uf
The total capacitance of two 15uf capacitors connected in series is? - Correct Answer 15uf
The total capacitance of two 5uf capacitors and on 10uf capacitor in parallel is? - Correct Answer 20uf
The total opposition to current flow in an AC circuit is known as ? - Correct Answer Impedance
The true power in a circuit with 4A through a 50ohm resistor is ? - Correct Answer 200w
The two windings of a conventional transformer are known as the ? - Correct Answer Primary and secondary
windings.
What is the peak voltage in a circuit with an RMS voltage of 120 VAC ? - Correct Answer 170 VAC
When the current increases in an AC circuit, what role does inductance play ? - Correct Answer It reduces the current
Which of the following coils is likely to show the lowest inductance? - Correct Answer A coil with a narrow coil
Which of the following conditions exists in a circuit of pure inductance? - Correct Answer The voltage and current are
90 degrees out of phase
Wich of the following conditions exist in a circuit of pure resistance ? - Correct Answer The voltage and current are in
phase
