1. Ying Yi PhD Physics Lab 2 1 PHYS Lab II @ HCC 2014 Spring

2. Course outline Lab 1: Introduction Lab 2: Electric Field Lab 3: Ohm’s Law Lab 4: RC circuit Lab 5: RL circuit Lab 6: Focal length of Thin Lenses Lab 7: Diffraction Grating 2 PHYS Lab II @ HCC 2014 Spring

3. PHYS 1108 Lab Report 1. Title of the experiment Such as Electron Beam in B Field Not just the No. --- Lab 1 2. Introduction Theoretical background, find the link from the web, or textbook. 3. Equipment and Material 3 PHYS Lab II @ HCC 2014 Spring

4. 4. Procedure Photo of set up 5. Data --- Table/Graph Make sure including the TITLE & UNIT 6. Calculation Unit, unit, unit !!! 4 PHYS Lab II @ HCC 2014 Spring

5. 7. Error Analysis Error% = abs ( Value cal – Value exp )/Value cal 8. Conclusion Including the source of error Lab Report must be typed, due the following Friday 5 PHYS Lab II @ HCC 2014 Spring

6. How to use a Muiltimeter? http://www.youtube.com/watch?v=bF3OyQ3Hwf U 6 PHYS Lab II @ HCC 2014 Spring

7. Which one measures DC voltage? A B C D 7 PHYS Lab II @ HCC 2014 Spring

8. Where do we plug black jack? 8 PHYS Lab II @ HCC 2014 Spring ABC D: It depends what you want to measure.

9. Is it right to measure resistance this way? 9 PHYS Lab II @ HCC 2014 Spring YES or NO

10. Is this right to measure current? 10 PHYS Lab II @ HCC 2014 Spring YES or NO

11. Which is the correct way to measure current? 11 PHYS Lab II @ HCC 2014 Spring AB

12. To do list PHYS Lab II @ HCC 2014 Spring 12 Select two resistors(51 Ohms & 240 Ohms) Make a series Circuit(Measure I, V, Ω for each resistance and equivalent resistance to see if R e =R 1 +R 2 ; V e =V 1 +V 2 ; I e =I 1 =I 2 ) Make a parallel circuit(Measure I, V, Ω for each resistor and equivalent resistance to see if 1/R e =1/R 1 +1/R 2 ; V e =V 1 =V 2 ; I e =I 1 +I 2 )

13. PHYS Lab II @ HCC 2014 Spring 13 R1R1 R2R2 R 1 +R 2 ReRe % I1I1 I2I2 (I 1 +I 2 )/2IeIe % V1V1 V2V2 V 1 +V 2 VeVe % R1R1 R2R2 ReRe % I1I1 I2I2 I 1 +I 2 IeIe % V1V1 V2V2 (V 1 +V 2 )/2VeVe %

14. To do list PHYS Lab II @ HCC 2014 Spring 14 Select two resistors(51 Ohms & 240 Ohms) Make a series Circuit(Measure I, V, Ω for each resistance and equivalent resistance to see if R e =R 1 +R 2 ; V e =V 1 +V 2 ; I e =I 1 =I 2 ) Make a parallel circuit(Measure I, V, Ω for each resistor and equivalent resistance to see if 1/R e =1/R 1 +1/R 2 ; V e =V 1 =V 2 ; I e =I 1 +I 2 )

15. Select two resistors Two leads from the multimeter: Black ---- COM Red ----- ohms R1 = 51 ohms R2 = 240 ohms 15 PHYS Lab II @ HCC 2014 Spring

16. To do list PHYS Lab II @ HCC 2014 Spring 16 Select two resistors(51 Ohms & 240 Ohms) Make a series Circuit(Measure I, V, Ω for each resistance and equivalent resistance to see if R e =R 1 +R 2 ; V e =V 1 +V 2 ; I e =I 1 =I 2 ) Make a parallel circuit(Measure I, V, Ω for each resistor and equivalent resistance to see if 1/R e =1/R 1 +1/R 2 ; V e =V 1 =V 2 ; I e =I 1 +I 2 )

17. Series Connection – only one ends connected – no leaking R 1 51 ohms R 2 240 ohms V 5v Measure to see: R e = R1 + R2, V e = V1 + V 2 17 PHYS Lab II @ HCC 2014 Spring

18. Series Connection – Voltage Measurement R 1 51 ohms R 2 240 ohms V e 5v Measure to see: R e = R 1 + R 2, V e = V 1 + V 2 V2V2 V1V1 18 PHYS Lab II @ HCC 2014 Spring

19. Series Circuit – Current Measurement Break the circuit, multimeter connects in series with resistor R 1 51 ohms R 2 240 ohms V 5v Measure to see: R e = R 1 + R2, V = V1 + V2, I e = I 1 = I 2 I1I1 I2I2 19 PHYS Lab II @ HCC 2014 Spring

20. To do list PHYS Lab II @ HCC 2014 Spring 20 Select two resistors(51 Ohms & 240 Ohms) Make a series Circuit(Measure I, V, Ω for each resistance and equivalent resistance to see if R e =R 1 +R 2 ; V e =V 1 +V 2 ; I e =I 1 =I 2 ) Make a parallel circuit(Measure I, V, Ω for each resistor and equivalent resistance to see if 1/R e =1/R 1 +1/R 2 ; V e =V 1 =V 2 ; I e =I 1 +I 2 )

21. Parallel Connection – two ends connected V 5v R 1 51 ohm R 2 240 ohm Measure to check: V e = V 1 = V 2, 1/R e = 1/R 1 + 1/R 2 21 PHYS Lab II @ HCC 2014 Spring

22. Parallel Connection--- Voltage Measurement V 5v R 1 51 ohm R 2 240 ohm Measure to check: V e = V 1 = V 2, 1/R t = 1/R 1 + 1/R 2 V2 V1V1 VeVe 22 PHYS Lab II @ HCC 2014 Spring

23. Parallel Connection – Current I Measurement V 5v R 1 51 ohm R 2 240 ohm Measure Current I, Break the Circuit first, then meter connect to the two BREAKING ENDS I2 I1 IeIe 23 PHYS Lab II @ HCC 2014 Spring

24. 24 Think before you do! Don’t turn on the power before you ask me to check your circuit!