# LC electricity resistance, semi conductors and other stuff!

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } What is an emf? When a voltage is applied to a circuit What are the sources of an emf (electromotive force) electrical mainsthermocoupleA cell What is ohm's law? the voltage is proportional to the current for a metallic conductor at a constant temperature, the current will be proportional to the voltage Draw the graph for current and voltage in metals. and how is current carried? graph directly proportional by electrons Draw the graph for current and voltage in filament bulbs. and how is current carried by electrons curved surface because at higher voltages the increased heat increases resistance, and limits the current Draw the graph for current and voltage in gases. and how is current carried By ions at higher voltages, no more ions can be created, limiting the current higher curve slant than f.b Draw the graph for current and voltage in vaccum. and how is current carried The cathode must be warmed. At higher voltages, electrons move across the vacuum graph: behind middle up curve slant to the right Draw the graph for current and voltage in electrolysis (inactive electrodes). and how is current carried by ions graph: directly proportional behind the middle Draw the graph for current and voltage in electrolysis (active electrodes). and how is current carried by ions directly proportional What is resistance? of an object within an electrical circuit is defined as the ratio of the voltage across it to the voltage flowing through it R=V/Imeasured in ohm's What varies resistance the length (l)the cross-sectional area (A)the material from which the object is made (p) What is resistivity R=pl/A the resistance of a unit of that material What is the Wheatstone bridge used for? .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Authorcat126 ID351186 Card SetLC electricity resistance, semi conductors and other stuff! Descriptionrevision questions Updated2020-03-14T13:17:05Z Show Answers