Category: Combined Science

Physical quantities Physical quantity is a property of an object or substance that can be measured using an

Density of liquids Density is the mass per unit volume The units of density is g/cm3 or kg/m3

Weight and Mass It is the force acting on mass due to gravity. It is the pull of

Resistance It is the opposition of the flow of current. It is measured in Ohms (Ω). When applying

Uses of electricity in the home Lighting Heating Powering electrical devices e.g. motors   Electrical Power Is the

Electrostatic charging Friction between objects can cause electrons to be transferred from one object to another. When the

Hydro and thermal power generation The processes involved in the production of electricity at power stations depend on

Generator Notes Generator effect When a conducting wire is moved through a magnetic field, a voltage is generated