ASSIGNMENT 1

1-31. A triode electron tube is designed toconduct at 15 milliamperes of currentwhen its grid is at 0 volts relative to itscathode. For every volt below this,conduction will decrease by 1.5milliamperes. If the tube is biased at -3volts and has a 6-volt peak-to-peak inputsignal, what is the minimum amount ofcurrent that will conduct through thetube?Figure 1B.—Triode operation.1-28. The triode circuit depicted in figure 1Babove contains a 50 k W load resistor.When a 10-volt peak-to-peak ac signalis applied to the grid, current flow in thetube varies between 5 milliamperes and12 milliamperes. What is the peak-topeakamplitude of the output?1. 500 volts2. 350 volts3. 250 volts4. 150 volts1-29. Most amplifier circuits are designed tooperate with the grid negative in relationto the cathode. This is done to avoidwhich of the following problems?1. 11.5 milliamperes2. 6.0 milliamperes3. 1.5 milliamperes4. 0 milliamperes1-32. Overdriving can be considered a form ofdistortion for which of the followingreasons?1. The output is not in phase with theinput2. The output does not have the samepolarity as the input3. The output is not a faithfulreproduction of the input4. The output does not have the sameamplitude as the inputTHIS SPACE LEFT BLANKINTENTIONALLY.1. Excessive grid current2. Excessive plate current3. Distortion on small signals4. Distortion on large negative signals1-30. A triode amplifier has 350 volts appliedto its plate across a 25 k W load resistor.With no input signal applied and a biasvoltage of -9 volts, 4 milliamperesconducts across the tube. What is thequiescent plate voltage?1. 0 V2. 100 V3. 250 V4. 350 V4