TOPIC 7: GEOPHYSICS | PHYSICS FORM 4 Geophysics is a branch of science that deals with the physical, chemical, geological, astronomical and other characteristic properties of the earth.It deals with geological phenomena such as the temperature distribution of the earth’s interior, the source, configuration and the geomagnetic field. Structure and Composition of the Earth The … Read more
TOPIC 6: ELEMENTARY ASTRONOMY | PHYSICS FORM 4 Introduction to Astronomy The Concept of Astronomy Explain the concept of astronomy Astronomy is a branch of science which deals with the study of origin,evolution, composition, distance and the motion of all bodies and scattered matter in the universe. Universe is the totality of space and time … Read more
TOPIC 5: ELECTRONIC | PHYSICS FORM 4 Semi Conductors The Concept of Energy Band in Solids Explain the concept of energy bands in solids In solid-state physics, the electronic band structure (or simply band structure) of a solid describes those ranges of energy that an electron within the solid may have (called energy bands, allowed bands, or simply bands) and ranges … Read more
TOPIC 4: THERMIONIC EMISSION | PHYSICS FORM 4 Thermionic Emission Thermionic emission is the discharge of electrons from heated materials, widely used as a source of electrons in conventional electron tubes (e.g., television picture tubes) in the fields of electronics and communications. The phenomenon was first observed (1883) by Thomas A. Edison as a passage … Read more
TOPIC 3: RADIOACTIVITY | PHYSICS FORM 4 he Nucleus of an Atom The Structure of the Nucleus of an Atom Describe the structure of the nucleus of an atom The word atom is derived from the Greek word atom which means indivisible. The Greeks concluded that matter could be broken down into particles to small … Read more
TOPIC 2: ELECTROMAGNETISM | PHYSICS FORM 4 Magnetic Fields due to a Current-carrying Conductor How Electric Current Produce a Magnetic Field Explain how electric current produces a magnetic field Electromagnetism is the effect produced by the interaction of an electric current with a magnetic field. The interaction can result in a force causing the conductor carrying … Read more
TOPIC 1: WAVES | PHYSICS FORM 4 Introduction to Waves The Concept of Wave Explain the concept of a wave A wave is a disturbance that travels through a medium from one location to another location. Consider a slinky wave as an example of a wave. When the slinky is stretched from end to end … Read more
TOPIC 9: THERMAL CURRENT ELECTRICITY | PHYSICS FORM 3 Electromotive force (emf) and potential difference (pd) The Concept of Electromotive Force (emf) and Potential Difference (PD) Explain the concept of electromotive force (emf) and potential difference (pd) Potential difference (P.d) is the difference in potential between two charged points of conductor. It is measured in … Read more
TOPIC 8: VAPOUR AND HUMIDITY | PHYSICS FORM 3 Vapour The Process of Evaporation of Liquid Explain the process of evaporation of liquid Vapours These are molecules which escape into the atmosphere after liquids are heated. When a liquid is heated strongly then molecules tends to escape ( those molecules are called vapour). Most liquids evaporates … Read more
TOPIC TOPIC 7: MEASUREMENT OF THERMAL ENERGY | PHYSICS FORM 3 Heat Capacity Heat capacity is the amount of heat required to raise the temperature of an object or substance by one degree. The temperature change is the difference between the final temperature ( Tf) and the initial temperature ( Ti). The Factors which Determine Heat Quality of … Read more