Senior Physics Electricity

Here's a great set of videos to learn basic concepts of static electricity (video 1 to 3) and current of electricity (video 4 to 6).

Video 1: Conductors and Insulators

Video 2: Charging & Discharging

Video 3 - Charging by Induction

Video 4 - Current Electricity

Video 5 - Potential Difference

Video 6 - Resistance

Satellite Communication

Microwaves are more suitable for satellite communication (e.g. Global Positioning System, a.k.a. GPS) than radio waves because microwaves have higher frequencies than radio waves, which allows microwaves to pass through the ionosphere (part of the Earth’s atmosphere).

Reference: GCSE Bitesize

Brightness of lamp challenge

The diagram below shows two lamps, A and B, connected in parallel to the mains supply of a house.

A variable resistor is connected at P. State and explain what happens to the brightness of lamp B as the resistance of the variable resistor increases.

Acknowledgement: The diagram is obtained from GEO O-level Physics N11/2/10.

Answer: Brightness of lamp B remains unchanged as the potential difference of the lamp B remains unchanged.

NUS PC1432 (AY12/13 SEM 1) FINAL EXAM SUGGESTED SOLUTIONS

I don't have time to draw any nice diagrams so you may have to spend some time reading my long answers. Hopefully, I don't have too many typos. Just leave a comment if you have found one and alert me if you think I am talking rubbish anywhere in the solution. Anyway, the examination paper can be obtained from http://libportal.nus.edu.sg/frontend/index. =)

(Disclaimer: The author has tried his best to ensure the quality of the solution. However, the author will not responsible for any liabilities that arise directly or indirectly from the usage of these solutions.)

Part II Question 7: This question is similar to Question 3 of AY10/11. Here's the solution for this problem: http://teacher.pas.rochester.edu (Problem 31.15). The graph should look something like this: http://www.ittc.ku.edu (last page).

NUS PC1432 (AY10/11 SEM 1) FINAL EXAM SOLUTIONS

The solutions can be found here: http://www.nusdiary.com/groups/nussolutions/forum/topic/pc1432-sample-lab-reports-tutorials-midterms-and-final-exams-solutions/.

NUS PC1432 (AY10/11 SEM 2) FINAL EXAM SUGGESTED SOLUTIONS

I don't have time to draw any nice diagrams so you may have to spend some time reading my long answers. Hopefully, I don't have too many typos. Just leave a comment if you have found one or if you think I am talking rubbish anywhere in the solution. Anyway, the examination paper can be obtained from http://libportal.nus.edu.sg/frontend/index. =)

(Disclaimer: The author has tried his best to ensure the quality of the solution. However, the author will not responsible for any liabilities that arise directly or indirectly from the usage of these solutions.)

* Part I Question 5,6,and Part II Question 9 are just some boring A-level physics questions. =) I shall spend my precious time other tougher questions. Having said that, I may still come back to Question 9 as Quantum Physics is my interest.

NUS PC1432 (AY09/10 SEM 2) FINAL EXAM SUGGESTED SOLUTIONS

*The suggested solutions for PC1432 (AY12/13 SEM 1) can be found here: http://jatw88.blogspot.sg/2013/04/nus-pc1432-ay1112-sem-2-final-exam.html. The ones for AY11/12 SEM 2 can be found here: http://jatw88.blogspot.sg/2013/04/nus-pc1432-ay1112-sem-2-final-exam_30.html.

Currently, I don't have time to draw any nice diagrams so you may have to spend some time reading my long answers. Hopefully, I don't have too many typos. Just leave a comment if you have found one or if you think I am talking rubbish anywhere in the solution. Anyway, the examination paper can be obtained from http://libportal.nus.edu.sg/frontend/index. =)

DISCLAIMER: THE AUTHOR HAS TRIED HIS BEST TO ENSURE THE QUALITY OF THE SOLUTION. HOWEVER, THE AUTHOR IS NOT RESPONSIBLE FOR ANY LIABILITIES THAT ARISES DUE TO QUALITY OF THE SOLUTION.

PART II QUESTION 7(b): This is a tough question which commonly appears in examinations and PhD qualifying examinations. The solutions can be found from the following http://prezi.com/41twyc0vdsam/pc2131-tutorial-2/ (go to question 4). These slides belong to a TA of NUS physics department. I will give a more detailed answer if I have time.

PC3231 (AY10/11 SEM 1) FINAL EXAMINATION SUGGESTED SOLUTION

I have volunteered to come out with the suggested solutions for PC3231's final examination questions. Since it's my work, so I decided to share with you all. The examination paper can be obtained from http://libportal.nus.edu.sg/frontend/index.

(Disclaimer: The author has tried his best to ensure the quality of the solution. However, the author will not responsible for any liabilities that arise directly or indirectly from the usage of these solutions.)