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1. Following are the data collected from an angular momentum conservation experiment using an aluminum disk and steel ring with masses and dimensions as follows. Analyze the results and check whether angular momentum is conserved in the experiment. Obtain the % difference L10 and L202.(20 points) Mass of Aluminum Disc (m in Kg) = 0.106 Kg Radius of Aluminum Disc (r in m) = 0.0445m Mass of Steel ring (M in Kg) -0.267Kg, Inner Radius of Steel Disc (riin m) 0.0143m, Outer Radius of Steel Disc (rzin m) = 0.0445m Moment of Inertia of disk is given by 1 = mr2 Moment of Inertia of ring is given by Is = M(r² + r3) Angular momentum L = 1 w Percent Run wz (Rad/s) L1 (Kg mº/s) L2 (Kg m2/s) s Difference Al disk 5.373 (Rad/ Al disk+ 2.710 Al disk Steel Ring 5.276 Steel Ring+ 3.807 1.62% Al disk

2.Calculate the equivalent resistances of the following four circuits, compare the values with the experimental values in the table and calculate the % difference between experimental and theoretical values. Series Circut: Reg R1 + R2 + R3 + ... 1 1 1 1 Parallel Circut: + R1 R2 R₃ - + +... Rea

R=5602 Ri= 330 22 R2 =5602 R = 3302 Circuit 1 Circuit2 R4 = 1002 Ri= 330 32 R = 1002 R2 = 5602 R = 3302 Ra =330 2 Rs=5602 R = 5602 R3 = 100 S2 Circuit 3 Circuit 4

Circuit 3 Circuit 4 Circuit Circuit 1 Percent Difference (%) Circuit 2 Equivalent Resistance (12) Theoretical: Experimental: 795 Theoretical: Experimental: 199 Theoretical: Experimental: 232 Theoretical: Experimental: 360 Circuit 3 Circuit 4

3.Following data are obtained from an experiment to determine the factors affecting electrical resistance. Brass Rod of Diameter 3.18 mm Length Potential Current Resistance (in cm) (in mV) (in A) (R = V/I in ohms) 0 .125 .1792 5 .205 .1731 10 .282 .1709 15 .359 1705

20 ,435 .1702 25 .518 .1697 30 .596 .1695 35 .674 .1692 a. Calculate the value of resistances for various lengths(5point) b. Plot a graph of R vs length(in m) and measure the slope of the best fit. What is the unit of the slope? (Spoint) slope= c. If your fitting equation is R=(p/A)L where A is the area of cross section of the wire(= Tır?), and p is the specific resistance of the material, calculate the value p of brass with units. (10point)