Questions 24 - 26: A cylinder of unknown material has a length of 1 cm and a diameter of 2 cm. The resistance of the cylinder is 250. 24. What is the resistivity of the unknown material? A. 0.785 0.m C. 3.142 0.m B. 7.85 x 10 3 0.m D. 0.03142 0.m Phys 251 17 March 13 - 15, 2024 25. Suppose you are able to uniformly stretch the cylinder to a length of 2 cm and that its diameter becomes 0.25 cm. How much is the resistance, in comparison to R = 2507 A. R B. 32R C. AR D. 16R 26. How much is the resistance (in comparison to R = 250) if you cut the original cylin- der in half lengthwise (that is, cut it into two pieces having length 0.5 cm and diameter 2 cm)? A. 0.25R B. R C. 0.5R D. 0.125R