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Converging lens - Which shows the image formed correctly?
Answer: Option A View the explanation Click here to view the basic concepts of converging lens https://www.sgphysicstuition.com/post/converging-lens-overview
Evan Toh
May 211 min read
Which has higher specific heat capacity and latent heat of fusion?
Answers: Option C View the explanation
Evan Toh
May 211 min read
Finding the density of the alloy
Answer: Option C View the explanation
Evan Toh
May 211 min read
What is the acceleration of the 10kg block if the string breaks
Answer: Option D View the explanation
Evan Toh
May 211 min read
Speed-time graph of water rocket
Answer: Option C View the explanation
Evan Toh
May 211 min read
Magnet falls through solenoid, what is the direction of the induced current? (Pure Physics)
Answer: Option C View explanation
Evan Toh
May 201 min read
Liquid pressure involving two manometers with different liquids P and Q (pure physics)
Answer: Option A View the explanation
Evan Toh
May 201 min read
What is at Q to cause a force on P?
Answer: Option B View the explanation
Evan Toh
May 201 min read
Find length of copper wire Y, given both copper wires X and Y have same R.
Answer: Option D Refer to the video explanation
Evan Toh
May 201 min read
Which bulb X or Y is brighter, and which has higher resistance?
There are factors that affect resistance of the filament (conductor): length cross-sectional area Resistivity For our syllabus, brightness of the bulb depends on power. The higher the power, the brighter the bulb. e.g. a 100 W bulb is brighter than a 60 W bulb, View the video to understand the concepts better Video
Evan Toh
Mar 41 min read
2016 PPP1Q3 Initial acceleration and terminal velocity of heavier object
Answer: Option C View the video for explanation
Evan Toh
Nov 3, 20251 min read
Keeping the square wooden plane in equilibrium
Answer: Option A View the video for explanation
Evan Toh
Nov 3, 20251 min read
Pendulum - What is the period based on the height-time graph
Answer: Option D View the video for explanation
Evan Toh
Nov 3, 20251 min read
2016PPP1Q5 Camera in space station orbiting the Earth
Answer: Option A Many have the misconception that as the astronaut and camera are floating and weightless, there is no gravitational force acting on them. Actually both are inside the gravitational field of the Earth, and there is gravitational field strength, hence there is gravitational force acting on them towards the Earth. But as together with the station, they are all ‘free falling’, hence no normal contact force on the astronaut and camera, hence give the feeling of we
Evan Toh
Nov 3, 20251 min read
Distance travelled by the car between t = 3s to t = 4s during constant acceleration from rest
Answer: Option A
Evan Toh
Sep 8, 20251 min read
Find the density of liquid from a pressure-depth graph.
Liquid pressure P = pgh P is pressure in pascal (Pa) p is the density of the liquid (kg/m3) g is gravitational field strength (10 N/kg) h...
Evan Toh
Sep 8, 20251 min read
What is the numerical value of ratio of c/C？PP2020P1Q20
C is the heat capacity of a body. It is the amount of internal energy transferred to a body per unit change in temperature. (Or for 1...
Evan Toh
Sep 8, 20251 min read
Radioactivity involving background radiation - What is the reading on the detector after 68 hrs?
Answer: Option D Note that the reading shown on the detector (536 counts per second) includes the sum of count rate from the...
Evan Toh
Aug 20, 20251 min read
What time interval gives the half-life of X?
Answer: Option B We usually encounter decay graph of the unstable radiaoactive substance. But this graph is the mass-time graph of the...
Evan Toh
Aug 12, 20251 min read
What happens to the reading on the balance when current flows through the wire?
Answer: Option D We always use FLHR to find the force on the wire. But magnetic forces is a action-reaction pair. So when the force...
Evan Toh
Aug 12, 20251 min read
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