Determine the motion of the particles on transverse wave

Instead of imaging how the particles will move and guess their motion, there is a technique which can help you to determine that.

In addition, when particles are in phase, it means that both particles on the wave have the same velocity and same displacement. It means both have the same speed in the same direction and same distance and direction away from the rest position.

Particles that are out of phase means both are having the same speed but in opposite direction.

Refer to the video below to find out more.

Question 01: 2005/2008 PP P1 Q20/Q18

Question 02: 2018 PP P1 Q24

2013SPp1q17 What is the new P when V across resistor is doubled? Similar 2018PPp1q31

Answer: Option C

View the videos below to learn how to solve it. There are more than one method.

Alternatively, you may put values to work out using the 2 basic formulae of P = IV and V = IR. Refer the video below.

Similar question

2018PPp1q35

Answer: Option D

Total Internal Reflection (TIR) example 02

Solutions:

a) 38.8o      b) 41.8o

c) 51.2o . The ray does not emerge as total internal reflection has occurred. The angle of incidence is greater than critical angle and the light is traveling from a denser towards a less dense medium.

Click here to view the video tutorial for working and explanation for (a) and (b).

Click here to view the video tutorial for working and explanation for (c) and (d).