NATS 1945 Chapter Notes - Chapter 6: Tungsten, D Battery, Automotive Battery

• School: York University
• Department: Natural Science
• Course: NATS 1945
• Professor: Robin Metcalfe

Document Summary

Voltage: the amount of energy carried by electrons through a conductor. Measured in volts (v); 1v = 1 joule per coulomb. Oh(cid:373)"s la(cid:449): v = curre(cid:374)t (cid:454) resista(cid:374)(cid:272)e (cid:894)v = i (cid:454) r(cid:895) So, we quantify the amount of energy that a power source supplies to its electrons using the v unit. All power sources can be characterized by their specific v, meaning the number of j that power source supplies to each group of 6 million trillion electrons. D battery has a larger supply of electrons to keep up with the demand. In a circuit, the voltage is related to the current and resistance. What the relationship allows us to do is essentially make a circuit work. Suppose we hook up a 9v battery to a device with a resistance of 18 ohms, we can use the law to determine the amount of current that the r will draw from the battery.