77 lines
3.5 KiB
Markdown
77 lines
3.5 KiB
Markdown
E5C Coordinate systems and phasors in electronics: rectangular coordinates; polar coordinates; phasors; logarithmic axes
|
|
|
|
- [[E5C01]] (A)
|
|
Which of the following represents pure capacitive reactance of 100 ohms in rectangular notation? #card
|
|
- [[A.]] 0 - j100
|
|
- [[B.]] 0 + j100
|
|
- [[C.]] 100 - j0
|
|
- [[D.]] 100 + j0
|
|
- [[E5C02]] (C)
|
|
How are impedances described in polar coordinates? #card
|
|
- [[A.]] By X and R values
|
|
- [[B.]] By real and imaginary parts
|
|
- [[C.]] By magnitude and phase angle
|
|
- [[D.]] By Y and G values
|
|
- [[E5C03]] (C)
|
|
Which of the following represents a pure inductive reactance in polar coordinates? #card
|
|
- [[A.]] A positive 45 degree phase angle
|
|
- [[B.]] A negative 45 degree phase angle
|
|
- [[C.]] A positive 90 degree phase angle
|
|
- [[D.]] A negative 90 degree phase angle
|
|
- [[E5C04]] (D)
|
|
What type of Y-axis scale is most often used for graphs of circuit frequency response? #card
|
|
- [[A.]] Linear
|
|
- [[B.]] Scatter
|
|
- [[C.]] Random
|
|
- [[D.]] Logarithmic
|
|
- [[E5C05]] (C)
|
|
What kind of diagram is used to show the phase relationship between impedances at a given frequency? #card
|
|
- [[A.]] Venn diagram
|
|
- [[B.]] Near field diagram
|
|
- [[C.]] Phasor diagram
|
|
- [[D.]] Far field diagram
|
|
- [[E5C06]] (B)
|
|
What does the impedance 50 - j25 ohms represent? #card
|
|
- [[A.]] 50 ohms resistance in series with 25 ohms inductive reactance
|
|
- [[B.]] 50 ohms resistance in series with 25 ohms capacitive reactance
|
|
- [[C.]] 25 ohms resistance in series with 50 ohms inductive reactance
|
|
- [[D.]] 25 ohms resistance in series with 50 ohms capacitive reactance
|
|
- [[E5C07]] (D)
|
|
Where is the impedance of a pure resistance plotted on rectangular coordinates? #card
|
|
- [[A.]] On the vertical axis
|
|
- [[B.]] On a line through the origin, slanted at 45 degrees
|
|
- [[C.]] On a horizontal line, offset vertically above the horizontal axis
|
|
- [[D.]] On the horizontal axis
|
|
- [[E5C08]] (D)
|
|
What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive, and/or capacitive reactance? #card
|
|
- [[A.]] Maidenhead grid
|
|
- [[B.]] Faraday grid
|
|
- [[C.]] Elliptical coordinates
|
|
- [[D.]] Polar coordinates
|
|
- [[E5C09]] (A)
|
|
When using rectangular coordinates to graph the impedance of a circuit, what do the axes represent? #card
|
|
- [[A.]] The X axis represents the resistive component, and the Y axis represents the reactive component
|
|
- [[B.]] The X axis represents the reactive component, and the Y axis represents the resistive component
|
|
- [[C.]] The X axis represents the phase angle, and the Y axis represents the magnitude
|
|
- [[D.]] The X axis represents the magnitude, and the Y axis represents the phase angle
|
|
- [[E5C10]] (B)
|
|
Which point on Figure [[E5-1]] best represents the impedance of a series circuit consisting of a 400-ohm resistor and a 38-picofarad capacitor at 14 MHz? #card
|
|
|
|
- [[A.]] Point 2
|
|
- [[B.]] Point 4
|
|
- [[C.]] Point 5
|
|
- [[D.]] Point 6
|
|
- [[E5C11]] (B)
|
|
Which point in Figure [[E5-1]] best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz? #card
|
|
|
|
- [[A.]] Point 1
|
|
- [[B.]] Point 3
|
|
- [[C.]] Point 7
|
|
- [[D.]] Point 8
|
|
- [[E5C12]] (A)
|
|
Which point on Figure [[E5-1]] best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz? #card
|
|
|
|
- [[A.]] Point 1
|
|
- [[B.]] Point 3
|
|
- [[C.]] Point 7
|
|
- [[D.]] Point 8 |