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 3-9B1 What value of series resistor would be needed to obtain a full scale deflection on a 50 microamp DC meter with an applied voltage of 200 volts DC? 4 megaohms 3-9B2 Which of the following Ohms law formulas is incorrect? I = R / E 3-9B3 If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor? 100 volts 3-9B4 If a 100-ohm resistor is connected across 200 volts, what is the current through the resistor? 2 amperes 3-9B5 If a current 0f 3 amperes flows through a resistor connected to 90 volts, what is the resistance? 30 ohms 3-9B6 A relay coil has 500 ohms resistance, and operates on a 125 mA. What value of resistance should be connected in series with it to operate from 110 V DC? 380 ohms 3-10B1 What is the peak-to-peak RF voltage on the 50 ohm output of a 100 watt transmitter? 200 volts 3-10B2 What is the maximum DC or RMS voltage that may be connected across a 20 watt, 2000 ohm resistor? 200 volts 3-10B3 A 500-ohm, 2-watt resistor and a 1500-ohm, 1-watt resistor are connected in parallel. What is the maximum voltage that can be applied across the parallel circuit without exceeding wattage ratings? 31.6 volts 3-10B4 In figure 3B1, what is the voltage drop across R1? 5 volts 3-10B5 In figure 3B2, what is the voltage drop across R1? 9 volts 3-10B6 What is the maximum rated current carrying capacity of a resistor marked "2000 ohms, 200 watts"? 0.316 amperes 3-11B1 What is the most the actual transmit frequency could differ from a reading of 462,100,000 Hertz on a frequency counter with a time base accuracy of ± 0.1 ppm? 46.21 Hz 3-11B2 The second harmonic of a 380 kHz frequncy is: 760 kHz 3-11B3 What is the second harmonic for SSB frequency4146 kHz? 8292 kHz 3-11B4 What is the most the actual transmitter frequency could differ from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of ± 1.0 ppm? 156.52 Hz 3-11B5 What is the most the actual transmitter frequency could differ from a reading of 156,520,000 Hertz on a frequency counter with a time base accuracy of +/- 10 ppm? 1565.2 Hz 3-11B6 What is the most the actual transmitter frequency could differ from a reading of 462,100,000 hertz on a frequency counter with a time base accuracy of ± 1.0 ppm? 462.1 Hz 3-12B1 At pi/3 radians, what is the amplitude of a sine wave having a peak value of 5 volts? +4.3 volts 3-12B2 At 150 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? +2.5 volts 3-12B3 At 240 degrees, what is the amplitude of a sine wave having a peak value of 5 volts? -4.3 volts 3-12B4 What is the equivalent to the root-mean-square value of an AC voltage? The DC voltage causing the same heating in a given resistor as the RMS AC voltage of the same value 3-12B5 What is RMS value of a 340 volt peak-to-peak pure sine wave? 120 volts AC 3-12B6 Determine the phase relationship between the two signal shown in figure 3B3. B is lagging A by 90 degrees 3-13B1 What does the power factor equal in an R-L circuit having a 60 degree phase angle between the voltage and the current? 0.5 3-13B2 If a resistance to which a constant voltage is applied is halved, what power dissipation will result? Double 3-13B3 746 watts, coorsponding to the lifting of 550 pounds at the rate of one-foot-per-second, is the equivalent of how much horsepower? One horsepower 3-13B4 In a circuit where the AC voltage and current are out of phase, how can the true power be determined? By multiplying the apparent power times the power factor 3-13B5 What oes the power factor equal in an R-L circuit having 45 degrees phase angle between the voltage and the current? 0.707 3-18B6 What does the power factor equal in an R-L circuit having 30 degree phase angle between the voltage and the current? 0.866 3-14B1 What is the term for the time required for the capacitor in an RC circuit to be changed to 63.2% of the supply voltage? One time constant 3-14B2 What is the meaning of the term “time constant of an RC circuit”? The time required to charge the capacitor in the circuit to: 63.2% of the supply voltage 3-14B3 What is the term for the time required for the current in an RL circuit to build up to 63.2% of the maximum value? One time constant 3-14B4 What is the meaning of the term “time constant of an RL circuit”? The time required for the: Current in the circuit to build up to 63.2% of the maximum value 3-14B5 After two time constants, the capacitor in an RC circuit is charged to what percentage of the supply voltage? 86.5 % 3-14B6 After two time constants, the capacitor in an RC circuit is discharged to what percentage of the starting voltage? 13.5 % 3-15B1 What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors all in parallel? 220 seconds 3-15B2 What is the time constant of a circuit having two 100-microfarad capacitors and two 470-kilohm resistors all in series? 47 seconds 3-15B3 What is the time constant of a circuit having a 100-microfarad capacitor and a 470-kilohm resistor in series? 47 seconds 3-15B4 What is the time constant of a circuit having a 220-microfarad capacitor and a 1-megohm resistor in parallel? 220 seconds 3-15B5 What is the time constant of a circuit having two 100-microfarad capacitors and two 470-kilohm resistors all in parallel? 47 seconds 3-15B6 What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors all in series? 220 seconds 3-16B1 What is the impedance of a network composed of a 0.1-microhenry inductor in series with a 20-ohm resistor, at 30 MHz? Specify your answer in rectangular coordinates. 20 +j19 3-16B2 In rectangular coordinates, what is the impedance of a network composed of a 0.1-microhenry inductor in series with a 30-ohm resistor, at 5 MHz? 30 +j3 3-16B3 In rectangular coordinates, what is the impedance of a network composed of a 10-microhenry inductor in series with a 40-ohm resistor, at 500 MHz? 40 +j31400 3-16B4 In rectangular coordinates, what is the impedance of a network composed of a 1.0-millihenry inductor in series with a 200-ohm resistor, at 30 kHz? 200 + j188 3-16B5 In rectangular coordinates, what is the impedance of a network composed of a 0.01-microfarad capacitor in parallel with a 300-ohm resistor, at 50 kHz? 159 - j150 3-16B6 In rectangular coordinates, what is the impedance of a network composed of a 0.001-microfarad capacitor in series with a 400-ohm resistor, at 500 kHz? 400 - j318 3-17B1 What is the impedance of a network composed of a 100-picofarad capacitor in parallel with a 4000-ohm resistor, at 500 KHz? Specify your answer in polar coordinates. 2490 ohms, /-51.5 degrees 3-17B2 In polar coordinates, what is the impedance of a network composed of a 100-ohm-reactance inductor in series with a 100-ohm resistor? 141 ohms, /45 degrees 3-17B3 In polar coordinates, what is the impedance of a network composed of a 400-ohm-reactance capacitor in series with a 300-ohm resistor? 500 ohms, /-53.1 degrees 3-17B4 In polar coordinates, what is the impedance of a network composed of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series? 500 ohms, /37 degrees 3-17B5In polar coordinates, what is the impedance of a network comprised of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor? 240 ohms, /36.9 degrees 3-17B6 Using the polar coordinate system, what visual representation would you get of a voltage in a sinewave circuit? The plot shows the magnitude and phase angle 3-18B What is the magnitude of the impedance of a series AC circuit having a resistance of 6 ohms, an inductive reactance of 17 ohms, and zero capacitive reactance? 18 ohms 3-18B2 A 1-watt, 10-volt Zener diode with the following characteristics: Imin. = 5 mA; Imax. = 95 mA; and Z = 8 ohms, is to be used as part of a voltage regulator in a 20-V power supply. Approximately what size current-limiting resistor would be used to set its bias to the midpoint of its operating range? 200 ohms 3-18B3 Given a power supply with a no load voltage of 12 volts and a full load voltage of 10 volts, what is the percentage of voltage regulation? 20 % 3-18B4 What turns ratio does a transformer need in order to match a source impedance of 500 ohms to a load of 10 ohms? 7.1 to 1 3-18B5 Given a power supply with a full load voltage of 200 volts and a regulation of 25%, what is the no load voltage? 250 volts 3-18B6 What is the conductance (G) of a circuit if 6 amperes of current flows when 12 volts DC is applied? 0.50 Siemens (mhos)