Electrical Energy and Power

Contents / notes

• Concepts of electrical energy and power.
• Commercial units of electrical energy and power.
• Electric power transmission.
• Heating effects of electric current.
• Electrical wiring of houses.
• Use of fuses.

Candidate objectives

• Apply expressions for electrical energy and power to solve problems.
• Analyse how power is transmitted from a power station to consumers.
• Identify the heating effects of current and their uses.
• Identify the advantages of parallel arrangements over series arrangements.
• Determine the fuse rating.