Where different temperature limitations of individual components are applied to a single circuit, the principle of the ? is often used to determine the temperature rating of the entire circuit.

How does an observation about an object differ from an inference about that object

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?