phy lab 8 - 8.1.2 Batteries in Series I 1. V=E-I r r =...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 8.1.2 Batteries in Series I 1. V=E-I r r = {(V-E)/I} r = (4.25V-4.44V)/0.1A = 1.9 2. E' = E1+E2+E3 = 1.479V+1.479V+1.472V = 4.43V 3. Percent Difference = {abs(E-E')/E'}x100% {abs(4.44-4.43)/4.43}x100% = 0.23% 4. In ternal resistance combined (r) = 1.9 Individual battery resistance (1.9/3) = 0.63 0.4753 was what was found in 8.1.1, which differs by .15 which seems to be consistent on how the resistance of the batteries also add up. 8.1.4 Exercise 1. E'-E+r'I+r I=0 so I = (E-E')/(r'+r) 2. 3. I = 0.5V/(2 x 0.4753) = 0.52594A Power = (I^2 R) = (0.52594^2)(0.4753) = 0.131496 J/s Heat in one hour = (0.131496 J/s)(60s) = 7.89 J 4. lkdfjg 5. A fuse contains a strip of composed of different metals that are able to complete the circuit. Theses filaments are designed to break or melt when the amount of current has been exceeded, thus protects from further damage to occur. 8.2.2 I n te rnal Resistance of an Analog Voltmeter Measured in Use 1. V = IR R = (V/I) 1st t r ial R = (10.5V/0.00419A) = 2,505 2nd t r ial R = (17.5V/0.00708A) = 2,472 2. The voltmeter's resistance is proportional to the voltage resistance since the two sets of data do appear constant. WHY? 8.2.6 Effect of the I n te rnal Resistance of a Voltmeter on Voltage Measurments 1. Measured applied voltage = 14.83V 2. V1 Analog voltmeter Digital Voltmeter 7 7.18 V2 7 7.65 V3 5.5 7.4 V4 2.25 7.44 V5 0.2 7.48 ...
View Full Document

This note was uploaded on 05/06/2010 for the course PHY 117N taught by Professor Schwitters during the Spring '08 term at University of Texas at Austin.

Page1 / 2

phy lab 8 - 8.1.2 Batteries in Series I 1. V=E-I r r =...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online