4 Figure 1B. Triode operation. 1-28.     The triode circuit depicted in figure 1B above contains a 50 k W load resistor. When a 10-volt peak-to-peak ac signal is applied to the grid, current flow in the tube varies between 5 milliamperes and 12 milliamperes. What is the peak-to- peak amplitude of the output? 1.    500 volts   2.    350 volts   3.    250 volts   4.    150 volts 1-29.     Most amplifier circuits are designed to operate with the grid negative in relation to the cathode. This is done to avoid which of the following problems?   1.    Excessive grid current   2.    Excessive plate current   3.    Distortion on small signals   4.    Distortion on large negative signals 1-30.     A triode amplifier has 350 volts applied to its plate across a 25 k W load resistor. With no input signal applied and a bias voltage of - 9 volts, 4 milliamperes conducts across the tube. What is the quiescent plate voltage? 1. 0 V 2.    100 V 3.    250 V 4.    350 V 1-31.     A triode electron tube is designed to conduct at 15 milliamperes of current when its grid is at 0 volts relative to its cathode. For every volt below this, conduction will decrease by 1.5 milliamperes. If the tube is biased at - 3 volts and has a 6-volt peak-to-peak input signal, what is the minimum amount of current that will conduct through the tube?   1.    11.5 milliamperes   2.      6.0 milliamperes   3.      1.5 milliamperes   4.      0 milliamperes 1-32.     Overdriving can be considered a form of distortion for which of the following reasons?   1.    The output is not in phase with the input   2.    The output does not have the same polarity as the input   3.    The output is not a faithful reproduction of the input   4.    The output does not have the same amplitude as the input THIS SPACE LEFT BLANK INTENTIONALLY.