Data Sheet Name: Group: Date experiment performed: Part 1: Voltage and current relation for a given resistor, R Step 4) Table 1, R = 2 ohm V = VR (v) 1 2 3 4 5 6 I 2 IR (A) Calculate the slope: Find (1/slope): what does (l/slope) represent? For the given resistor (R = 2 ohm) How does the current through R, IR relate to the voltage across R, VR? Step 5) Table 2, R = 3 ohm V = VR (v) 1 2 3 4 5 6 I 2 IR (A) Calculate the slope: Find (1/slope): what does (l/slope) represent? For the given resistor (R = 2 ohm) How does the current through R, IR relate to the voltage across R, VR? Step 6) Table 3 R = 2 ohm R = 3 ohm V = VR (V) 6 6 1: IR (A) For a given voltage across a resistor does the current through the resistor, IR increase or decrease for a larger resistor value? Part 2: Voltage and current relation for a light bulb Step 7) In your own words, explain why does the slope change? Step 8) Table 4 V = Vlamp (V) at knee V = Vlamp (v) at final point I = [lamp (A) at knee 1 = [lamp (A) at fianl point Calculate the slope up to the knee (Hint: use the origin (0,0) and the knee points): Calculate the slope of the straight line beyond the knee (Hint: use the knee and the final points): Brooklyn College 8 Is the resistance of the lamp larger before or after the knee? Why? Part 3: Different combinations of resistors A: Series combination of reslstors Step 7) What do you expect the reading of the voltmeter to be? What do you expect the value of qu to be? Using eqnl 5, calculate Rm: Step 8) Simulator values Reading of voltmeter (v) Rea (ohm) = (Reading of voltmeter /Reading of ammeter) R2,, (ohm) from Step 7 Reading of ammeter (A) 3: Parallel combination of resistors Step 3) What do you expect the value of RM to be? Bigger that 51 ohms or smaller than 10 ohms? Using eqnl 6 calculate Req: Step 4) Simulator values Reading of voltmeter (v) Rea (ohm) = (Reading of voltmeter /Reacling of ammeter) R9,, (ohm) from step 3 Reading of ammeter (A) c: A mixed combination of resistors Step 3) a: which resistors are in parallel here? Step 4) Using step 3 and eqn 6, calculate Rum: Redraw the circuit here: Calculate R10\") eq: Step 5) Simulator values Reading of voltmeter (v) Rea (ohm) = (Reading of voltmeter /Reading of ammeter) R total 2:; (ohm) from step 4 Reading of ammeter (A) Answers to tuSIIDI'ISi l. 2, 3, Brooklyn College