IB Physics Questionbank Topic 5 Electricity and Magnetism Past Paper Questions, SL Paper1

Disclaimer: Some of the video's answers might not match the mark scheme, and I apologize for my mistakes in the video. I have uploaded the mark scheme to my website to check their answers. Here are some clarifications about the problems.

Hi everyone. Thank you for watching my videos; I hope you found them helpful. I apologize for the mistakes in the video since it was very long, so I got distracted several times, though this is not an excuse. Below are some corrections for my answers with explanations.

6:25 The answer is correct using the approach in the video.

15:22 The answer should be D. I made a mistake when applying the left-hand rule. The magnetic field points from the north to the south, so your left-index finger (2nd finger) will point rightwards. Electrons move into the page, so currents point out of the page. As a result, your thumb points upward.

22:25 The answer should be A (2r). In the problem, I made a calculation mistake.

1:37:15 The answer should be C. (The graph shows the current variation with a potential difference for a filament lamp. What is the resistance of the filament when the potential difference across it is 6.0 V? ). The approach shown in the video is doable interval is small enough. However, the method is not recommended. At a voltage of 6.0V, it has an approximate value of 9mA. Calculate resistance by dividing the voltage by the current, and you will obtain an immediate answer to C. Remember to convert the unit of mA to A during the calculation.The approach shown in the video is correct. However, the calculated potential difference and current interval need to be smaller to get an answer closer to 670 ohms, for example, from 4.4 volts to 6.4 volts.

For more problems, please go to

Content of the video
00:00 Intro
03:15 Page 2
06:07 Page 3
08:05 Page 4
13:30 Page 5
18:26 Page 7
25:02 Page 8
30:33 Page 9
48:12 Page 11
1:01:25 Page 13
1:17:41 Page 17
1:25:55 Page 19
1:39:00 Page 21

[scienceknowledge]

Hi everyone. Thank you for watching my videos; I hope you found them helpful. I apologize for the mistakes in the video since it was very long, so I got distracted several times, though this is not an excuse. Below are some corrections for my answers with explanations.

6:25 The answer is correct using the approach in the video.

15:22 The answer should be D. I made a mistake when applying the left-hand rule. The magnetic field points from the north to the south, so your left-index finger (2nd finger) will point rightwards. Electrons move into the page, so currents point out of the page. As a result, your thumb points upward.

22:25 The answer should be A (2r). In the problem, I made a calculation mistake.

1:37:15 The answer should be C. (The graph shows the current variation with a potential difference for a filament lamp. What is the resistance of the filament when the potential difference across it is 6.0 V? ). The approach shown in the video is doable interval is small enough. However, the method is not recommended. At a voltage of 6.0V, it has an approximate value of 9mA. Calculate resistance by dividing the voltage by the current, and you will obtain an immediate answer to C. Remember to convert the unit of mA to A during the calculation.

[youngman]

great video! i'd like to point out a minor mistake in 22:35 wherein you canceled out the exponent, this led to forgetting to root the 4. hence, answer for this question must be 2r not 4r.

[baptahhotep]

what a great channel i subscribed instantly thanks for the video

[jozkobranko]

at 13:28 when question ends, since this is mc you can't use calculator & pico isn't 10ˆ-12? so your working should be incorrect but my guess of ˆ-13 was same as yours.

[kadiryel]

For the question on 15:22, I believe the answer should be the option D. Put your four fingers on the direction from N to S, which is the magnetic field. The movement of the electrons is into to the screen, which is where you put your thumb. Then if the thing that is being sent is an electron, then the force is in the opposite direction of your palm. Which makes the correct answer for the question D.

[liamjones]

22:50 didn't you make a mistake because r is squared so its 2r because then it is sqaured and cancels out the 4l from numerator.

[hectorgrand]

Yo, thanks for the video, I was just wondering at 8:53 why the magnetic field cancel out?

[shamelsinha]

I have the mark scheme for this paper. I noticed that some of your answers do not match with the mark scheme? But thanks a lot for the video overall. Helped a ton!

[devkhakhar]

isn't the Answer D in 2 question.Please let me know.