WCF 15112019

1a. What is current and resistance? Page 1-1
	Current is the flow of the electrons in a conductor. It is measured in Ampheres (A)
	Resistance is the opposition to current flow and measure in Ohms
 b. What is conductor and insulator? Page 1-3
	~Conductor allows electrical current to flow through it.
	Examples of good conductors are copper and silver wire.
	~Insulator does not allow current to flow through it.
	Examples are rubber, wood and plastic

2. What are the 4 factors that affect resistance?
	Material - Different materials have different values of resistance. Example Copper
	Length - The longer the length of the conductor the higher is the resistance
	Cross-sectional area - The greater the cross-sectional area, the lower is the resistance
	Temperatire - The higher the temperature, the higher the resistance

3. What is DC & AC? Page 1-8
	Direct Current (DC) is the current that flows continuously in one direction. Examples Battery & Accumulator
	Alternating Current (AC) is a current that flows first in one direction for a brief time and then reverse to flow in the opposite direction for a similar period of time. Example home power socket which provides 230V

4. What is frequency & period? Page 1-9
	Frequency is the number of cycles per second
	Period is the time taken to comeplete 1 cycle. It is measured in second (s)