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Copper spheres P and Q, P has larger volume. What quantity is the same? 2020PP01q7
This question is very straight forward. As both P and Q are copper, the density will be the same. But many are unsure of KE. Let look at...
Evan Toh
Nov 4, 20241 min read
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What happens to frequency and speed of water wave as it goes to shallow region? 2019PPp1q23
Once the wave is produced, the frequency remains constant. Hence speed V of the wave is directly proportional to the wavelength of the...
Evan Toh
Nov 4, 20241 min read
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Evan Toh
Nov 4, 20241 min read
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What is the resistance of Y when its length is doubled and diameter three times larger? 2018PPp1q31
When question states that radius or diameter is increased by 3 times, that note that cross-sectional area does not increase by 3 times....
Evan Toh
Nov 4, 20241 min read
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PP2022P1Q17 Why is the athlete wrapped with silver and white sheet after a run?
We have learned that silver smooth reflective surface is a poor absorber , poor emitter or a good reflector of infra-red radiation. How...
Evan Toh
Oct 30, 20241 min read
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2007PPp1q28 2019PPp1q33 - Which V-I readings are for torch lamp?
2019PPP1Q33 Ans: Option B 2007PPP1Q28 Ans: Option B Torch lamp or bulb is a non-ohmic conductor . The V-I graph has an increasing...
Evan Toh
Oct 25, 20241 min read
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Evan Toh
Oct 25, 20241 min read
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DC Question – Find unknown R, given the voltmeter readings when switch P and Q are closed respectively
Answer : Option A
Evan Toh
Oct 25, 20241 min read
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Distance of sound detector from walls
Answer: Option B
Evan Toh
Oct 25, 20241 min read
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Minimum distance h mirror from the floor
Answer: Option B
Evan Toh
Oct 24, 20241 min read
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Object is released and free-falling. Time taken to fall vertically from P to Q?
Keep in mind that you can utilize the two main concepts of a speed-time graph. As object is under free-fall, the acceleration (the...
Evan Toh
Oct 24, 20241 min read
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Converging Lens – Which ray is correct after passing through the lens
Which of the following light rays behaves correctly when it passes through the converging lens? Solutions: Option C Recall these basic...
Evan Toh
Oct 24, 20241 min read
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Evan Toh
Oct 24, 20241 min read
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2024 Specimen Paper 6091 P1 Q30 Filament bulb graphs
When comes to filament lamp, the non-ohmic characteristic properties comes to mind. But for this quesitons, you have to understand that...
Evan Toh
Oct 23, 20241 min read
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2020PPp1q9 moments – Find force P acting on stick by shoulder
Using the concepts that POM, we know 1) Ma = Mc 2) net force on the stick is 0N. Most of us will most likely to take pivot about P as...
Evan Toh
Oct 23, 20241 min read
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2016PPP1Q40 – Voltage and Power of Bulb Y when X is switched off - 2013PPP1Q40 heaters
2016PPP1Q40 Solutions: Option C [There is another similar question in 2013 Nov Pure Physics P1Q40. The answer is Option C too. Refer to...
Evan Toh
Oct 22, 20241 min read
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Minimum force F to push barrel up a step
Answer: Option D
Evan Toh
Oct 20, 20241 min read
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Video 02 Finding resultant force from vector diagram provided
(1) 2003PPq1q7 (0 min to 2.42 min) Ans: Option A (2) 2023PPp1q4 (2.47 min 3.54 min) Ans: Option C (3) 2018PPp1q2 (3.45 min to 6.22 min)...
Evan Toh
Oct 20, 20241 min read
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Video 01 How to find resultant force of two or three forces (without drawing vector diagram)
Below are some examples of questions that involve finding the resultant force due to two or three forces. Below are the questions in the...
Evan Toh
Oct 20, 20241 min read
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2015 PurePhy P1Q6 – Using Newton’s 3rd Law to find Forward Thrust
Refer to this MCQ from PurePhysics 2015P1Q6 Answer: Option C
Evan Toh
Oct 16, 20241 min read
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