GCE

2024 Pure Physics 6091 P3 Section B Q3 - Mechanics Set-up

Evan Toh

1 day ago0 min read

2024 Pure Physics 6091 P3 Section B Q3 - Mechanics Set-up

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2024 Pure Physics 6091 P3 Section A Q2 - Electricity Set-up

Evan Toh

1 day ago0 min read

2024 Pure Physics 6091 P3 Section A Q2 - Electricity Set-up

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2024 SciPhysics 5086 P5 Practical - Electricity

Evan Toh

Nov 261 min read

2024 SciPhysics 5086 P5 Practical - Electricity

Finding the resistance of unknown resistor R

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Radioactivity - Questions on Penetrating Ability and Applications

Evan Toh

Nov 71 min read

Radioactivity - Questions on Penetrating Ability and Applications

2002PPQ38, 2003PPQ38, 2005PPQ37, 2006PPQ38, 2007PPQ39 Answer: Option B Answer: Option D Answer: Option B Answer: Option C Answer: Option...

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Radioactivity - Questions on mass number and proton number of the nucleus after decay

Evan Toh

Nov 71 min read

Radioactivity - Questions on mass number and proton number of the nucleus after decay

2005SPQ20, 2006PPQ40, 2005PPQ38, 2003PPQ39 Answer: Option A Answer: Option D Answer: Option B Answer: Option C Answer: Option B Answer:...

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Radioactivity - Questions on emissions through electric and magnetic field

Evan Toh

Nov 61 min read

Radioactivity - Questions on emissions through electric and magnetic field

Alpha particle is a helium nucleus which is positive charged . Beta particle is an electron which is negative charged . Gamma ray has...

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Radioactivity - Which statements is not true about alpha particle? Is alpha particle radioactive? 2001PPp1q35

Evan Toh

Nov 60 min read

Radioactivity - Which statements is not true about alpha particle? Is alpha particle radioactive? 2001PPp1q35

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Copper spheres P and Q, P has larger volume. What quantity is the same? 2020PP01q7

Evan Toh

Nov 41 min read

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...

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What happens to frequency and speed of water wave as it goes to shallow region? 2019PPp1q23

Evan Toh

Nov 41 min read

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...

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Energy dissipated by resistor in one period based on CRO waveform 2020PPp1q40

Evan Toh

Nov 41 min read

Energy dissipated by resistor in one period based on CRO waveform 2020PPp1q40

Answer: Option C

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What is the resistance of Y when its length is doubled and diameter three times larger? 2018PPp1q31

Evan Toh

Nov 41 min read

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....

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PP2022P1Q17 Why is the athlete wrapped with silver and white sheet after a run?

Evan Toh

Oct 301 min read

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...

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2007PPp1q28 2019PPp1q33 - Which V-I readings are for torch lamp?

Evan Toh

Oct 251 min read

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...

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2024 Specimen Paper 6091 P1 Q30 Filament bulb graphs

Evan Toh

Oct 231 min read

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...

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2020PPp1q9 moments – Find force P acting on stick by shoulder

Evan Toh

Oct 221 min read

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...

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2016PPP1Q40 – Voltage and Power of Bulb Y when X is switched off - 2013PPP1Q40 heaters

Evan Toh

Oct 221 min read

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...

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2010SPP2Q12 Fuel gauge using variable resistor

Evan Toh

Oct 221 min read

2010SPP2Q12 Fuel gauge using variable resistor

Solutions: As the fuel level drops, the float which stays on the fuel surface will descend. The rod which is attached to the float will...

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Using P = I^2R and P = V^2/R to explain which component uses the highest power or energy.

Evan Toh

Oct 211 min read

Using P = I^2R and P = V^2/R to explain which component uses the highest power or energy.

Instead of P = IV to explain, it might be easier to explain using P = I^2R when the components are connected in series where current I is...

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When a thermistor is connected in series with a fixed resistor, how to explain the p.d. varies as resistance temperature changes?

Evan Toh

Oct 211 min read

When a thermistor is connected in series with a fixed resistor, how to explain the p.d. varies as resistance temperature changes?

When two components are connected in series, where one is a fixed resistor and the resistance of the other can vary (e.g. thermistor,...

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2012PPp1q7(c) - Determine the p.d. between points A and C

Evan Toh

Oct 210 min read

2012PPp1q7(c) - Determine the p.d. between points A and C

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