The intensity (brightness) of the spot on the CRT screen be conveniently control

Question

The intensity (brightness) of the spot on the CRT screen be conveniently controlled by A. changing the voltage of the filament heater. B. changing the deflection plate voltage. C. changing the potential of the control grid. D. increasing V_B while at the same time decreasing V_C by similar amount The following graph is the oscilloscope display for channel 2?s voltage (V vs. t) for some circuit. The oscilloscope produces a stable signal. a) As well as you can tell from the graph, what is the trigger level? Indicate whether the triggering occurs "on the way up" or on "on the way down"? b) The triggering button has now been pressed for the channel 1? Describe what happens to the signal. Be brief.

Explanation / Answer

2.The intensity on the CRT screen can be controlled by changing the potential of the control grid

3.a. the triggering occurs on the way up of the signal
3.b.When the triggering button is pressed for channel 1 then a DC signal is appeared on the screen

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