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