| {"centerpiece": "A pipe full of air is closed at one end. A standing wave is produced in the pipe, causing the pipe to sound a note. Which of the following is a correct statement about the wave\u2019s properties at the closed end of the pipe?", "options": ["The pressure is at a node, but the particle displacement is at an antinode.", "The pressure is at an antinode, but the particle displacement is at a node.", "The pressure and the particle displacement are both at nodes.", "The pressure and the particle displacement are both at antinodes."], "correct_options": ["B"], "correct_options_idx": [1], "correct_options_literal": ["The pressure is at an antinode, but the particle displacement is at a node."]} | |
| {"centerpiece": "A photocell of work function \u03d5 = 2eV is connected to a resistor in series. Light of frequency f = 1 \u00d7 10^15 Hz hits a metal plate of the photocell. If the power of the light is P = 100 W, what is the current through the resistor?", "options": ["2:00 AM", "6:00 AM", "12:00 AM", "24 A"], "correct_options": ["D"], "correct_options_idx": [3], "correct_options_literal": ["24 A"]} | |
| {"centerpiece": "A microwave oven is connected to an outlet, 120 V, and draws a current of 2 amps. At what rate is energy being used by the microwave oven?", "options": ["10 W", "30 W", "60 W", "240 W"], "correct_options": ["D"], "correct_options_idx": [3], "correct_options_literal": ["240 W"]} | |
| {"centerpiece": "A point charge, Q = +1 mC, is fixed at the origin. How much work is required to move a charge, Q = +8 \u00b5C, from the point (0, 4 meters) to the point (3 meters, 0)?", "options": ["3.5 J", "6.0 J", "22.5 J", "40 J"], "correct_options": ["B"], "correct_options_idx": [1], "correct_options_literal": ["6.0 J"]} | |