GCE 3/3

Evan Toh

Dec 31, 20231 min read

2017PurePhyP2Q5 Two points on the rope wave with displacement-time graphs given

In this this question, the displacement-time graphs are given, which are different from displacement-distance graphs. In the...

Evan Toh

Nov 30, 20231 min read

2007PPP1Q27 brightness of bulb

Solutions: Option B As lamp X is thicker and shorter , these two factors make the resistance of X lower than Y . Recall: Length...

Evan Toh

Nov 30, 20231 min read

N2007P1Q9 Pure Physics – Energy needed to pump water up a building

Answer: Option B Since water will naturally reach 40m high from the bottom of the apartment, you only need to pump the water up by a...

Evan Toh

Nov 30, 20231 min read

2004PPp1q4 2010SPp1q4 Dynamics (3rd law)

Answer: Option D Key concept here is Newton’s 3rd Law. Action equals reaction. Both trolleys are connected by the spring, hence the...

Evan Toh

Nov 30, 20231 min read

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

These two 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...