Answer Happy

ill, measure the length of the table L Each member of the group Should do this at least 3 times. You should have a total of 10 measurements of L. 2. Part A: Construct the circuit in Figure ECO-1. Set R - 100 on the decadere sistance box. You may choose any one of the four unknown resistors in the black unknown resistor box (R, R. R, or R). Adjust the power supply output so that the ammeter current reading is 1 - 30 mA using the 50 mA scale. When reading the ammeter and voltmeter, make certain that your eyes are centered over the needle. This will minimize the parallax error. Measure and record I and V as shown on the meters. Record the smallest graduation of both meters. Part B: Now, move your eyes approximately 30 cm to either the left or right and record the apparent value of I. Repeat this for the voltmeter. This will give you an indication of how much parallax error can affect the reading. Part C: Disconnect the unknown resistor from the circuit. Measure the resistance of the resistor directly with the digital multimeter (DMM). It should be set to the 2 kn scale. 3. Using the circuit shown in Figure ECO-1, measure V for the following values of 1:1 - 5.0, 10.0, 15.0, 20.0, and 25.0 mA. Each student should measure V at each value of I. VI. FOR THE REPORT 1. Tabulate all measures of the length of the table L taken in V.1. List your measure ments in random order. Calculate the average value of the length, L; the standard deviation of Lo and the standard deviation of the mean of L, Op. Do this for the first 3 measurements of L, the first 5 measurements of L, and all 10 measurements of L. Report Lt o for the set of 10 measurements. How does the number of trials affecto, and or ? 2 Determine the uncertainty in V and I based on the smallest graduations on the meters and your parallax measurement of these quantities. You should assume that the error due to parallax is random, and therefore the uncertainty in /(and V as well will be given by d. Ja, due to parallax + ( due to meter graduation ANOMALLLLLLLLLLLARINA IITTUTTI This is a direct consequence of Eq. 9 in the prologue. Using V. I, and their respective uncertainties, calculate and report Rt . Compare this with the directly measured value of the resistance. Do these values agree! Tabulate the pairs of T and recorded in V 3. Plot V I. For each value of ne recorded values of V. Using LINEST in Excel, calculate and report the store tainty in the slope, inty in the slope, the intercept, and the uncertainty in the intercept of this plor in