Answer: Option D Alpha emission is the least penetrating, easily be blocked by a few cm of air, skin or thin paper. Beta emission can be...

Answer: Option C With first glance, we may think of using kinematics to solve. It can, but the process will be longer. Refer to the...

Answer: Option B Emf is the work done (energy needed) to carry a unit charge (1C) through the whole complete circuit. By definition, it...

Answer: Option B Wavefront is an imaginary line that joins all identical adjacent points that are in phase. So if you assume the circular...

Answer: Option A W = mg, where g is the gravitational field strength. g = W/m, hence g is the gravitational force (pull) acting per unit...

Though the graph is a height-time graph, it is similar to a distance-time graph. Questions: 2017PPp1q3 and 2020PPp1q5 Answer: Option D

Instead of the usual ball release from rest, this question states that the ball has an initial velocity greater than terminal velocity in...

Instead of the usual vector diagram involving forces, these questions involve speed in a specific direction, which is velocity. Velocity ...

This question is challenging to students as there are many information given. But it is actually quite straight forward when you save one...

Answer: Option B Similar questions https://www.sgphysicstuition.com/post/video-01-how-to-find-resultant-force-of-two-or-three-forces-with...

In the syllabus, we are required to understand the orders of magntiude of various objects. Though we may no need to memorise the exact...

2002PPQ38, 2003PPQ38, 2005PPQ37, 2006PPQ38, 2007PPQ39 Answer: Option B Answer: Option D Answer: Option B Answer: Option C Answer: Option...

2005SPQ20, 2006PPQ40, 2005PPQ38, 2003PPQ39 Answer: Option A Answer: Option D Answer: Option B Answer: Option C Answer: Option B Answer:...

Alpha particle is a helium nucleus which is positive charged . Beta particle is an electron which is negative charged . Gamma ray has...

Half-life of a radioactive nuclide is the time taken for half the nuclei of that nuclide in any sample to decay . (time taken for the...

This question is very straight forward. As both P and Q are copper, the density will be the same. But many are unsure of KE. Let look at...

Once the wave is produced, the frequency remains constant. Hence speed V of the wave is directly proportional to the wavelength of the...

Answer: Option C

When question states that radius or diameter is increased by 3 times, that note that cross-sectional area does not increase by 3 times....