What mass is converted into energy by a 1.00-MT bomb?
Monday, February 17, 2014 Origin of resistivity ions are at rest, electrons flow ions vibrate, electrons collide with ions and stop Stopping of electron: stopping of a current. At higher T, ions vibrate with larger amplitude: higher resistance electrons ions A 2 Other Temperature Dependence At very low temperatures the resistivity of some materials goes to exactly zero (not just small, exactly 0). These materials are called superconductors electrons do not collide with ions at all The resistance of some semiconducting materials actually decreases with increasing temperature number of conducting electrons depends on T 42 Power dissipated by circuit with resistively drifting electrons collide with ions and stop. energy of drift motion (energy of a flowing current) is given to ions. Ions are heated electrons ions A How much power a current dissipates 4 Energy and Power in Electric Circuits (1) Consider a simple circuit in which a source of emf with voltage V causes a current i to flow in a circuit. The work required to move a differenti