PHYS 1010Q Study Guide - Midterm Guide: Work Function, Hertz, 12012
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PHYS 1010Q Full Course Notes
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Most obvious and common is the battery. Battery is rated by size and voltage. A and aa batteries are typically 1. 5 v. Putting batteries together makes them act a little bit differently. V = ir i = v/r. I = 1. 5 v / 15 . V = ir r = v/i. R = 0. 050 a / 1. 5 v. 0. 050 a was converted from 50 ma. When you plug in, you get a certain voltage and up to a certain limit, it gives out a certain current. But, unlike batteries, the voltage constantly changes. Energy is represented with e or u. Power (p) = qv/ t = iv. E = (1. 5 kw)(0. 5 hr) = 0. 75 kw hr . Money: (0. 75 kw hr)(0. 12 $/ kw hr) R = p (120v )2 = 3. 1 m if dry, 1000 . Voltage is 120v in electrical wall outlet. I = v/r = 120 v/ 10 3 .
