GCE 2/3

Video 02 Finding resultant force from vector diagram provided

Evan Toh

Oct 201 min read

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)...

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2015 PurePhy P1Q6 – Using Newton’s 3rd Law to find Forward Thrust

Evan Toh

Oct 161 min read

2015 PurePhy P1Q6 – Using Newton’s 3rd Law to find Forward Thrust

Refer to this MCQ from PurePhysics 2015P1Q6 Answer: Option C

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Direction of Frictional Force on Tyre or Wheel

Evan Toh

Oct 161 min read

Direction of Frictional Force on Tyre or Wheel

For these type of questions, it is important to identify which tyre/wheel is connected/powered by the engine or the person. On each tyre...

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2021PPp1q36 DC circuit, which circuit has a potential difference between P and Q

Evan Toh

Oct 151 min read

2021PPp1q36 DC circuit, which circuit has a potential difference between P and Q

Do you understand why there is a potential difference between P and Q? What if you are to find the potential difference between P and Q?...

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2012PPp2q07 - Find the p.d. across A and C

Evan Toh

Oct 151 min read

2012PPp2q07 - Find the p.d. across A and C

Instead of the usual finding of potential difference across a component, in this question, you are required to find the p.d. across two...

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2021SPp2q8 - Which appliance uses most energy (using P = V^2/R to explain)

Evan Toh

Jan 311 min read

2021SPp2q8 - Which appliance uses most energy (using P = V^2/R to explain)

Resistors may be connected in series or parallel. When asked which resistor has higher power (hence higher energy), in general we will...

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PP2017Q11 Using P=I^2R and P=V^2/R to explain which has higher power

Evan Toh

Jan 311 min read

PP2017Q11 Using P=I^2R and P=V^2/R to explain which has higher power

Resistors may be connected in series or parallel. When asked which resistor has higher power (hence higher energy), in general we will...

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2013PPP1Q30 – Direction of the electric field around a negative charge

Evan Toh

Jan 311 min read

2013PPP1Q30 – Direction of the electric field around a negative charge

Ans: Option A View the video tutorial for the explanation:

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Evan Toh

Jan 11 min read

Ticker Tape Timer

Ticker tape timer is a device which punches dots on a tape at specific time interval. The tape can be attached to a moving object. With...

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2010SPp1q12 Lens - focal length definition

Evan Toh

Jan 11 min read

2010SPp1q12 Lens - focal length definition

Answer: Option C Focal length f is the distance between the focal point and the centre of the lens (optical centre) . Note that only...

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2008PPp1q15,2017PPp1q15– Pressure constant, rate of collision decreases

Evan Toh

Jan 12 min read

2008PPp1q15,2017PPp1q15– Pressure constant, rate of collision decreases

When gas in piston and heated but pressure remains constant. It is easier to explain in terms of the average force acting on a unit area....

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2021SPP1Q15 Electric field lines between the two charges

Evan Toh

Dec 31, 20231 min read

2021SPP1Q15 Electric field lines between the two charges

Answer: Option D View the video tutorial for the explanation

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Evan Toh

Dec 31, 20232 min read

2013SPp2q9 – Pressure and Moment

Solutions: (a) (i) A bigger force than F can be obtained due to the lever system and hydraulic system . Lever system: Applying...

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SP N2007 P1 Q16 – Which events will cause the fuse to blow?

Evan Toh

Dec 31, 20232 min read

SP N2007 P1 Q16 – Which events will cause the fuse to blow?

An electric cable contains three wires live, neutral and earth. The cable is correctly wired to a plug which contains a 3A fuse. The...

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PP2017p1q21 Sound – time taken for the next rarefaction to arrive at the point P

Evan Toh

Dec 31, 20231 min read

PP2017p1q21 Sound – time taken for the next rarefaction to arrive at the point P

Answer: Option A

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2004PPp1q15 - Volume of bubble at bottom of lake (P1V1 = P2V2)

Evan Toh

Dec 31, 20231 min read

2004PPp1q15 - Volume of bubble at bottom of lake (P1V1 = P2V2)

Answer: Option A Since the air bubble is enclosed, PV at A is equal to PV at B. PAVA = PBVB (Patm + Pwater) VA =...

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PP2008Q11OR Thermistor in series with fixed resistor, explanation on pd and graph

Evan Toh

Dec 31, 20231 min read

PP2008Q11OR Thermistor in series with fixed resistor, explanation on pd and graph

As both the fixed resistor and the thermistor are connected in series, the sum of potential difference across them will be equal to the...

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PP N2010 P1 Q4 Two objects same size and shape but one is heavier. Motion when both released

Evan Toh

Dec 31, 20231 min read

PP N2010 P1 Q4 Two objects same size and shape but one is heavier. Motion when both released

Solutions: Option C When a body is released from rest, the only force acting on the body is its weight due to gravity . Both bodies...

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Identifying what lens, focal length and image from 2 rays – PP2010P1Q23 and SP2014P1Q11

Evan Toh

Dec 31, 20231 min read

Identifying what lens, focal length and image from 2 rays – PP2010P1Q23 and SP2014P1Q11

These 2 questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...

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PP2006P1Q21 SP2009p1q11-how many students can see the images of the other two

Evan Toh

Dec 31, 20231 min read

PP2006P1Q21 SP2009p1q11-how many students can see the images of the other two

Answer: Option D

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