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physics labs

# physics labs - fctYP ll'l m s I\b ~d'a'0 lI_~II I~(J 40 PH...

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fctYP ll'l m+ s \b' ~d. 'a I 1-11-12 ::'0 ·lI_~II+I~-(J)

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40 PH 132 Labs PH 132: Pre-lab 3 2. Fig 3.4B shows an" incomplete" breadboard arrangement of the schematic circuit of Fig 3.4A. Draw lines (representing connecting wires) in Fig 3.4B to complete the circuit. - ., " " + - Fig.3.4A Note: Only one wire can be used in each slot of breadboard + .----(9 Red t Breadboard Fig.3.4B
PH 132 Labs 43 li,S ) 3. What is the magnitude of the potential difference between points Band E in Figure 3.1? c { } .., ~ ., - ., .... -' ..•..•. ., - ., - ., - .., - .•...• ~ - - ~ .., ..., - .., .- .., </I!\ - 4. Suppose that during procedure s'teps 2 and 3, the resistor R4 (a simple carbon resistor) is being heated by blowing hot air from a hair-drier. How would this affect the measured value of il? Increased, decreased, or, unaffected? Explain. - -- o 'l- fu (/fd[T- To7) , ~;~ @ e Xf i ct; ,?,d~®

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PH 132 Labs 45 / 5,) 6. Error Analysis. Suppose that in an experiment, we determine E by measuring i, RI, iI, and R4 in loop ABeD of circuit I (Fig. 3.1). Here, we utilize Eq. 3.B, that is, d 'Z' ==- i ( c), 0 ~ ) d . " ~ X/01J~L- 1., ~ ~ I =- i, (tJ\ V 2- ) .of< j .:o,1J! /! j to determine the best value of E in terms of the best values of the measured quantities. It is given tha~ ill = 10.0 [2, il4 = 205.6 [2, Z = 53.8 mA, and Zl = 21.1 mA. It is also given that the pe~ce;;-tileu~er~ai~tie;Tn the values of R~ andfiare~h resist~rs, an.d the percentIle uncertamtles m the values of 2 and 21 ar ~~ or bqth currents. USIng thIS information, calculate the percentile uncertainty in the va Uk of E. ~ttach an extra page if you need more space to answer this' question. - -:/£ = :- PI f- it E ----- - ----~" - ef ..... '2-- ( c;) <C 2.- j ~ . I 2.. 0> £ c-'7~ ,6,£ ---IJ C) ~ b{J} -f ~ 6/<;) -f"\ d Z, 6Z/) r- ( cJ- ~~.J ~ [(fu ~i,» (~2>,tc// -tlfltt bi'l-(~,~)j"'-_ ~. J:; 'tlj ., l.-df ~ If! ® 1-- I Z . ~. - .... " -' ~ - •••• - - ,...,. ..." ~. •• -
____________ Section _ - -- - - - -- - Date: - Name -. Student No. - .., PH 132 Labs PRE-LAB EXERCISE: PH 132 - Experiment 4 55 z.t You are given a fully charged capacitor. Following the procedure used in this lab, you completely discharge this capacitor, and subsequently, charge it up again to its maximum capacity. The current in the RC circuit is recorded without interruption throughout these discharging and charging steps. In the space below, schematically show the expected behavior of this current as a function of time.

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