The variable resistor (rheostat) is a device to control the size of the current by adjusting the resistance on the variable resistor ....

Refer to the video below for the setting up of the apparatus. Why do you need a variable resistor (rheostat)? Without the variable...

Resistors may be connected in series or parallel. When asked which resistor has higher power (hence higher energy), in general we will...

Refer to the notes below together with the video to learn more about the CRO Videos

Transverse waves are waves in which travel perpendicular to the direction of vibration of particles.

Ticker tape timer is a device which punches dots on a tape at specific time interval. The tape can be attached to a moving object. With...

In a vacuum room, where is no air resistance, the bowling ball will have the same acceleration as the feather, which is 10 m/s2 on earth....

Physical Quantity is a quantity that can be measured and it consists of a numerical magnitude (size) and a unit . (e.g. 5m where 5 is...

Prefixes are used to simplify the writing of very big or very small numbers. For instance, instead of having to write 12 500 000 m every...

When gas in piston and heated but pressure remains constant. It is easier to explain in terms of the average force acting on a unit area....

When a system is in equilibrium , 2 conditions are met. 1) Principle of Moment (POM): Sum of anticlockwise moment = Sum of clockwise...

Solutions: a) Refraction     b) 48.6o     c) c = 41.8o     e) 70o d) Total internal reflection has occured, as the angle of incidence is...

A common mistake is to state that the reason for switch to be on the live wire is “so that the switch can turn on/off the appliance”....

1. Converging lens (convex lens) Converging lens, also known as convex lens,  is thicker at the centre. Below shows some examples. In...