AC vs DC (1 Viewer)

[Tommy_Lamp]

I need to know the Disadvantages of AC and DC but i cant find them anywhere, any suggestions?

 

[Calculon]

DC Generators
Advantages
- Current travels through the whole of the wire, meaning less resistance
- No induced current in nearby conductors
- No health problems for those living near transmission lines as no changing
current
- Can be used for DC appliances such as batteries
Disadvantages
- Voltage cannot be stepped up easily
- Needs to use a split ring commutator and brushes which can wear out and
hence require maintenance
- More expensive and complicated, less reliable
- High power semiconductor devices reduce the demand for DC
Uses
Dynamos and battery chargers (because batteries require DC current)
AC Generators
Advantages
- Voltage can be stepped up through transformers, meaning less current
and therefore less resistance
- Uses slip rings, which do not require the regular servicing that a split ring
commutator does
- Three phase power is available
Disadvantages
- People living near transmission lines may experience health problems,
such as leukaemia
- Current only flows through the outer part of the wire, meaning that there is
more resistance to its movement. This is known as the ‘skin effect’
- Constant back emf
Uses
Main electricity grid because it can be sent over long distances with small energy
loss because of transformers.

 

[Tommy_Lamp]

danke herr calculus

 

[rumour]

I need to know the Disadvantages of AC and DC but i cant find them anywhere, any suggestions?

I suggest reading your textbook, looking at the notes at M&G on this website or going to the board of studies/hsc online websites!