Physics

NEWTON LAWS OF MOTION

Newton’s first law (law of inertia) This law states that “A body continues in its state of rest or uniform motion unless an unbalanced force acts on it”. The mass… Read More »NEWTON LAWS OF MOTION

SIMPLE MACHINE

Definition of Simple Machine A machine is a tool or device that makes work easier. It is defined as a tool which uses force applied (effort) at one point to… Read More »SIMPLE MACHINE

Introduction Refraction is the change of direction of light rays as they pass at an angle from one medium to another of different optical densities. Exp. To investigate the path… Read More »REFRACTION OF LIGHT

FLUID FLOW

Fluid in physics refers to liquids and gases. To study fluid flow we have to make the following assumptions: We consider fluids to be incompressible We assume that they have… Read More »FLUID FLOW

RADIOACTIVITY – MEANING, USES, TYPES, EFFECTS, DANGER & PROPERTIES

Meaning of Radioactivity Radioactivity is the spontaneous disintegration or breaking down of the nucleus of an atom which makes it give out or emit radiation. Any element that disintegrates spontaneously… Read More »RADIOACTIVITY – MEANING, USES, TYPES, EFFECTS, DANGER & PROPERTIES

ELECTRICAL ENERGY – MEANING, FUSE, CIRCUIT BREAKER & RAEDING

Electricity is the flow of electric current. Electric Current is the continuous flow of charges (electrons). It is also the rate of flow of charges. Electricity has several applications in the modern day society.

MAGNETIC EFFECT OF AN ELECTRIC CURRENT

Introduction: Oersted’s discovery. Hans Christian Oersted discovered the magnetic effect of a current in 1819. The direction of the field is dependent on the direction of the current. This discovery… Read More »MAGNETIC EFFECT OF AN ELECTRIC CURRENT

MEASUREMENT II

Measuring length using vernier callipers. Vernier callipers is used when higher accuracy in measurement is required and this cannot be done using a metre rule. Vernier callipers has two scales;… Read More »MEASUREMENT II

CELLS AND SIMPLE CIRCUITS

Introduction Work done per unit charge is called electrical potential. Current is the flow of charge. For current to be continuous, potential difference between the two points must be sustained.… Read More »CELLS AND SIMPLE CIRCUITS

ELECROSTATICS I

Some substances get charged when rubbed against other substances i.e. nylon, plastic, paper etc. the charge acquired stays within the body i.e. it does not move and therefore known as… Read More »ELECROSTATICS I

RECTILINEAR PROPAGATION AND REFLECTION AT PLANE SURFACES. INTRODUCTION

Objects that produce their own light are known as luminous objects i.e. the sun, torch lamps etc. objects that do not produce their own light are called non-luminous objects i.e.… Read More »RECTILINEAR PROPAGATION AND REFLECTION AT PLANE SURFACES. INTRODUCTION

HEAT TRANSFER

Heat is transferred in matter through the following methods: conduction, convection and radiation. Conduction This is the transfer of heat in solids. The rate of conduction depends on Amount of… Read More »HEAT TRANSFER

PRESSURE

Pressure is defined as the force acting normally (perpendicularly) per unit area . The SI units for pressure is newton per metre squared (N/m2). One Nm-2 is known as one Pascal… Read More »PRESSURE

THERMAL EXPANSION

Introduction Temperature is the degree of hotness or coldness of a body. Both Celsius scale (0C) and Kelvin scale (thermodynamic scale) are used to measure temperature. The Kelvin scale is… Read More »THERMAL EXPANSION

INTRODUCTION TO PHYSICS

Science in our lives Scientists are people trained in science and who practice the knowledge of science. We require people in industries to work as engineers, technicians, researchers, in hospitals… Read More »INTRODUCTION TO PHYSICS

MOTION

MOTION Types of motion: (a) random motion (b) Translational motion (c). Rotational motion (d). Oscillatory motion (e). relative motion Causes and effects of motion. Types of Motion Definition of… Read More »MOTION

CIRCULAR MOTION

CIRCULAR MOTION 1. Meaning of circular motion Definition of terms Angular velocity ii. Tangential velocity iii. Centripetal acceleration Centripetal force v. Centrifugal force vi. Period vii. Frequency Calculations on circular… Read More »CIRCULAR MOTION

Motion Part

MOTION 1. Force Types of forces. Friction and types. Calculations on friction. Advantages and disadvantages of friction. Ways of reducing friction. Force and the types, Friction and types Force… Read More »Motion Part

MEASUREMENT IN PHYSICS

MEASUREMENT IN PHYSICS Measurement of area and volume Concept & measurement of time and ways of measuring time. MEASUREMENT OF VOLUME Volume of liquid objects is measured using instruments… Read More »MEASUREMENT IN PHYSICS

Position, Distance and Displacement

Position, Distance and Displacement Concept of position, Concept of distance and displacement Distinction between distance and displacement. CONCEPT OF POSITION The position of an object is its location in… Read More »Position, Distance and Displacement