MC Physics Questions & Answers

MC Physics Questions & Answers *1.1.* An insulated container with a divider in the middle contains two separated gases. Gas 1 is initially at a higher temperature than gas 2. The divider is then removed. Which of the following observations might be made over a period of time as the two gases mix together, and why? - CORRECT ANSWER- On average, the molecules of gas 1 lose some of their kinetic energy to the molecules of gas 2 through collisions, resulting in the two gases eventually having the same temperature. *1.10.* *Graph with Potential Difference (V) on the Y-axis & Current (A) on the X-axis* The graph above shows experimental data for the potential difference across a lightbulb as a function of the current through the lightbulb. The power dissipated by the lightbulb when the potential difference across the bulb is 12 V is most nearly - CORRECT ANSWER- 9.6 W *1.11.* *Graph with Pressure on the Y-axis & Volume on the X-axis. Within the graph lies Point X, segments 1&2, and curve 3* The graph above shows pressure as a function of volume for a sample of an ideal gas. The gas has an internal energy of 1000 J at state X and is taken through the cycle shown. Process 3 is isothermal. The work that the gas does on the environment is 400 J during process 1 and 250 J during one complete cycle. What is the net thermal energy transferred into the gas during one complete cycle? - CORRECT ANSWER- 250 J *1.131.* Which of the following phenomena involving light can be explained with a particle model? Select two answers. - CORRECT ANSWER- The photoelectric effect *&* Atomic Emission *1.134.* A simple generator contains a conducting loop that rotates between the poles of a magnet. Which of the following helps explain why this rotation generates a potential difference? Select two answers. - CORRECT ANSWER- The component of the magnetic field perpendicular to the loop changes. *&* The angle between the plane of the loop and the magnetic field changes. *1.14.* *Circuit with 3 resistors, a capacitor and a battery*