Conceptual physics chapter 34

L> Physics Assignment Answers - March 6, 2001 Answers forCh 34 Physics AssignmentChapter 34 Recheck out Answers: (a) There should be a distinction in temperature in order for "warm to flow." (b) There must be a distinction in electric potential (potential difference) in order for charge to "flow." (a) Electric potential at a allude is the electrical potential energy that a test charge would have at that point split by the size of the test charge (V = EPE/q).

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(b) A potential difference exists between two points in room if the 2 points carry out not have the very same electrical potential. The potential distinction in between points A and B = potential at B - potential at A. (a) In order for water to circulation consistently through a pipe there need to be a difference in press in between the ends of the pipe. (b) In order for charge to "flow" repetitively via a wire, tright here should be a potential difference (distinction in potential) in between the ends of the wire. Electric current is the sustained motion of charges in a conductor. 1 Ampere = 1 Coulomb/second. In various other words, a present of 1 Ampere exists at a allude in a circuit if 1 Coulomb of charge pass that suggest each second. Voltage is the exact same as electrical potential. A 120 Volt potential difference indicates a difference of 120 Joules of power per Coulomb of charge. Charge flows through a circuit. In various other words, the charge that flows in a circuit is currently current in the circuit - it is not supplied by a battery or electric receptacle. Voltage does not flow - voltage is the potential difference between two points in a circuit. People frequently talk around the voltage "across" a circuit element, definition the potential distinction in between its ends. Electrical resistance impedes the motion of electric charge, a lot like friction impedes the activity of mass. Electrical resistance is generally better in lengthy wires than in brief wires, and also primarily higher in thin wires than in thick wires. Therefore, the electric resistance will be better in a lengthy, thin wire than in a brief, fat wire. Ohm"s Law says that voltage = (current)(resistance) - V = IR or I = V/R or R = V/I. Ohm"s Law (in the create I = V/R) states that the present in a conductor is inversely proportional to the conductor"s resistance. Because of this, if you double the resistance, you will obtain half the current. Ohm"s Law (in the create I = V/R) claims that the current in a conductor is directly proportional to the potential distinction throughout its ends. As such, if you have fifty percent the voltage, you acquire half the present.Chapter 34 Plug & Chug Answers: Current = Charge/time = (10 C)/(5 s) = 2 Amperes Current = Charge/time = (35 C)/(0.001 s) = 35 000 A I = V/R = (120 V)/(14 W) = 8.6 A I = V/R = (240 V)/(60 W) = 4 A I = V/R = (9 V)/(90 W) = 1/10 A = 0.1 A I = V/R = (6 V)/(1200 W) = 1/200 A = 0.005 A R = V/I = (3.0 V)/(0.4 A) = 7.5 W P = IV, so I = P/V = (140 W)/(120 V) = 1.2 Alast upday Marc h 6, 2001 by JLStanbrough