Question

Question 2: (Total 20 marks. Each question is worth 5 marks each) A. A flexible container is filled with Hydrogen gas at room temperature and the container is squeezed to one- third its volume. Explain how the pressure of the Hydrogen gas molecules in the flexible container will be affected by the change in volume? B. Device A with a resistance of 10 ohms and Device B with a resistance of 15 ohms are connected in a parallel circuit. Explain how the parallel connection will influence the flow of current and voltage in the two devices. C. Two metal bowls, one small and one large, are on a bench. If you strike both, you will hear a sound from each but they will not be the same. How will the sounds differ and why? D. Bar A (Copper material) and Bar B (Ferromagnetic material) are placed within a strong magnetic field. Explain whether the two bars will behave the same or not when the magnetic field is removed.

Answer 1

Since PV = nRT if V_f = v/3 then P_f = 3p so pressure increases by 3 times B) since v = IR if current in 10 omega will be 3/2 times that in 15 omega voltage across both resistance will be same C) frequency of sound from small bowl will be more than that from large bowl D) No both will behave different copper is diamagnetic material so it is weakly magnatise in opposite direction to applied field so when external field is removed Bar B has large magnetic field in direction of applied field but bar A has weak field in opposite direction