P1

Possible resistance values of the resistors in the potential divider

Answer: Option C

Evan Toh

Jul 141 min read

What is the resistivity of the material?

Answer: Option A

Evan Toh

Jul 141 min read

At this instant, how are the speed of the particles X, Y and Z compared?

Answer: Option B

Evan Toh

Jul 141 min read

Car at constant speed, which shows the work done by the engine and power of the engine?

Answer: Option A

Evan Toh

Jul 141 min read

Time taken for the temperature of the oil to rise by 10oC?

Answer: Option A Video explanation

Evan Toh

Jul 121 min read

Normal force P, Q and friction at Q, which force(s) will increase as the man climbs up the ladder?

When a body is in equilibrium, there are two conditions. 1) Net moment is zero: POM, anticlockwise moment = clockwise moment 2) Net force is zero: total upward forces = toward downward forces Answer: Option D View the explanation:

Evan Toh

Jul 121 min read

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

Power of the boy to go up a slope at constant speed

Answer: Option A View the 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

Find the ratio of mass of the wooden section to the plastic section of a composite rod pivoted at P

If you consider the composite rod as a whole, the centre of gravity CG is at the pivot. The line of action of the weight which acts from the CG passes through the pivot at P, there is no perpendicular distance, hence no moment created. Thus the rod is balanced at P. But to solve this question, you need to consider the weight of plastic and weight of wood separately in order to find the ratio and apply the Principle of Moments to solve it.

Evan Toh

Feb 201 min read