### Life Cycle of Star : Online Physics Class

The life cycle of the Star/Sun starts from nebulae (consisting of gas and dust). All stars start from a cluster of gas and dust but as gravity pulls all the gas and dust, a protostar will start to form. Protostar The stage where clusters of gas and dust gather and pull together. Temperature increases as […]

### Concave and Convex Ray Diagram: Online IGCSE Physics Class

Concave and Convex Ray Diagram Understand the concept of a ray diagram in a convex and concave lens. By being able to draw the ray diagram, students can understand the characteristics of the ray. The position of the object will tell whether the image formed (Real/ Virtual, Inverter/Upright and Magnified/Diminished) Ray Diagrams for Convex Lens […]

### Electricity Calculation: Online IGCSE Phyics Class

Calculating Wat in the Electrical Consumption The applications below are used in households. Find the amount of kWh usage for 5 hours. Give your Question 1: How much electrical energy in joules does a 100W lamp transfer in 1-second 5 seconds 1-minute Solution a) 1600 x 1 = 100J b) 100 x 5 = 500J […]

### Resistor Online IGCSE Phyics Class

Resistor is a device that limits the flow of the current.  The most commonly used film resistors can be divided into types according to the materials used: carbon-film, metal-alloy and metal-oxide.  Discuss the use of  Varistor LDR / Photoresistor Thermistor   Varistor Varistor stands for “variable resistor” and is an electronic component. It is used to […]

### Sensitivity of Thermometer

The sensitivity of the thermometer is the ability of the thermometer to detect a small change in temperature. Here are some of the factors that influence the sensitivity of glass thermometers Thickness of the glass wall A thicker glass wall reduces the sensitivity of the thermometer Diameter of the capillary tube The smaller diameter of […]

### Electric Field Online IGCSE Physics Class

An electric field is a region of electrical charge. We have two types of charges that create an electric field. Positive charge and negative charge. Positive charge: Field lines are extended outward from the positive charge Negative charge: Field lines are extended inward into the negative charge The diagram above shows the interaction between two […]

### Static Charge: Online IGCSE Physics Class

STATIC CHARGE ONLINE IGCSE PHYSICS CLASS Static charges are electrical charges comprised of Positive and Negative charges.  Static charges do not move since it resides statically on the insulators.  Like charges repel while unlike charges attract each other. How does static charge create? Static charges are produced when two or more objects are in contact […]

### Convex Lenses : Online IGCSE Physics Class

CONVEX LENSES There are two types of ray diagrams discussed in IGCSE. Concave Lenses Ray Diagrams Convex Ray Diagrams Looking at the table below, we can understand that there are different applications for convex lenses. Please look at the diagram for a better understanding.