Counting rate | | 1 ' { : : Applied voltage Figure 3.2: Count rate versus applied voltage for a Geiger tube. Consider Fig. 3.2 of the lab manual. In normal operation, a Geiger tube is operated in the plateau region above V. What is wrong with operation at other voltages? (O Above V3, the large current can destroy the tube. (O Below V1, the voltage is too low to sustain an avalanche or discharge, so no signal is detected. (O None of these. (O Both of these 0.4 (a) 0.3 0.2 0.1 0.0 0.6 (b) 0.4 0.2 0.0 0.8 (C) 0.6 0.4 0.2 0.0 70 72 74 76 78 80 82 Refer to Problem 5.4 (a) Only fractional numbers appear in the ordinates of the graphs. What number has divided the "occurrences" in the table? [ Select ](b) What bin width was used in Fig. (c)? = [ Select] (c)Which figure gives the most useful representation of the data? [ Select ] v