Electronics

Introduction to Electronics i) An insulator is a material or object which resists flow of heat (thermal insulator) or electrical charges (electrical insulators). Examples are paraffin, wood, rubber, plastics etc.ii) Conductors are materials that contain free electrons which carry an electrical charge

Radioactivity

Introduction to Radioactivity – Radioactivity was discovered by Henri Becquerel in 1869. In 1898, Marie and Pierre Curie succeeded in chemically isolating two radioactive elements, Polonium (z=84) and Radium (z=88).Radioactivity or radioactive decay is the spontaneous disintegration of unstable nuclides to form stable ones with

Photoelectric Effect

Introduction to Photoelectric Effect – Photoelectric effect was discovered by Heinrich Hertzin 1887.Photoelectric effect is a phenomenon in which electrons are emitted from the surface of a substance when certain electromagnetic radiation falls on it.– Metal surfaces require ultra-violet radiation

X-rays

What are X-rays? – X-rays were discovered by a German scientist namedRoentgen in 1985.– They can pass through most substances including soft tissues of the body but not through bones and most metals.– They were named X-rays meaning ‘unknown rays’.

Cathode Rays and Cathode Ray Tube

What is a Cathode Ray? These are streams of electrons emitted at the cathode of an evacuated tube containing an anode and a cathode. Production of Cathode Rays They are produced by a set up called a discharge tube where a high

Main Electricity

Introduction to Main Electricity – Mains electricity comes from a power station and its current is the alternating current which can either be stepped up or down by a transformer. A.c is produced when a conductor is rotated in a magnetic

Electromagnetic Induction

Introduction to Electromagnetic Induction Electromagnetism is the effect resulting from the interaction between an electric current and a magnetic field. This effect brings about induced electromagnetic force (e.m.f) and the resulting current is called induced current. Experiments on electromagnetic induction Consider

Electromagnetic Spectrum

Introduction to Electromagnetic Spectrum Electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. It includes visible light, ultra-violet rays, microwaves, X-rays, radio waves and gamma rays. Electromagnetic waves are produced when electrically charged particles oscillate

Floating and Sinking

Introduction to Floating and Sinking – Any object in a liquid whether floating or submerged experiences an upward force from the liquid; the force is known as upthrust force.– Upthrust force is also known as buoyant force and is denoted by letter ‘u’.

Uniform Circular Motion

What is Uniform Cicular Motion? Circular motion is the motion of bodies travelling in circular paths. Uniform circular motion occurs when the speed of a body moving in a circular path is constant.This can be defined as motion of an object at

Translation And Interpretation | English Form 5 & 6

Translation is a process by which ideas that are written in one language ar...

Writing Skills | English Form 5 & 6

Are the abilities that allow you to write effectively and concisely. A competent...

Reading Skills | English Form 5 & 6

Reading is the process of going through written information or piece of wor...

Speaking Skills | English Form 5 & 6

What is Speaking? SPEAKING SKILLS: Speaking is simply the act of talking wh...

Listening Skills | English Form 5 & 6

Listening is ability to accurately receive and interpret messages in the communi...

Word Formation | English Form 5 & 6

This is the field or branch of morphology which studies different principles or ...

Introduction To Language | English Form 5 & 6

Language is a symbol system based on pure or arbitrary  conventions…...

Topic

Form Five and Form Six

Ecology

Ecology is the study of the interactions between living things, such as humans, ...

Evolution

EVOLUTION Evolution is  a change in the genetic composition of a population...

Genetics

Genetics is the study of heredity and variationHeredity- is the passage of chara...

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