Evan Toh
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...
top of page
.png)
Evan Toh
Oct 201 min read
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...
4 views0 comments
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
14 views0 comments
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...
14 views0 comments
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?...
4 views0 comments
Evan Toh
Sep 302 min read
Finding focal length f of the lens using pin and mirror or sharp image from distance object
A thin convex lens is placed on a plane mirror and an object pin is then moved along the axis of the lens until an image is seen to...
6 views0 comments
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:
1 view0 comments
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...
3 views0 comments
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....
1 view0 comments
Evan Toh
Dec 31, 20231 min read
Pressure – Height of ethanol in the column
Answer: Option D
1 view0 comments
Evan Toh
Dec 31, 20231 min read
2 pistons of different pressure joined together - P1V1 = P2V2
Solution: Option C
1 view0 comments
Evan Toh
Dec 31, 20231 min read
Which is a possible displacement-time graph for particle Y?
Answer: Option D
3 views0 comments
Evan Toh
Dec 31, 20231 min read
Unusual Behaviour of Less Dense Balloon in Air or Water
Answer: Option A Of course if a heavy ball is suspended from the car we all know the ball will move in opposite direction of a...
4 views0 comments
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
3 views0 comments
Evan Toh
Dec 31, 20231 min read
1 view0 comments
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 =...
1 view0 comments
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...
7 views0 comments
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...
2 views0 comments
Evan Toh
Dec 31, 20231 min read
Where is the focal point of lens L1 and L2?
Answer: Option A Refer to the diagram (below left) which many are familiar. When parallel rays of light which are parallel to the...
1 view0 comments
Evan Toh
Dec 31, 20231 min read
Barometer with a layer of water – Find height of mercury H
Answer: Option B
1 view0 comments
bottom of page