救命呀~!好多野唔識呀@@|||

鬼鬼

2.Transistor係做咩ga? base 同common又有咩用?
<<<<
Transistor can be used in making IC.
Base and Common are the ports of the Transistor.


3. 點解circuit入面Voltage increase, Current Increase; 但係transporting electricity果時Voltage increase, Current Decrease?
<<<<<<
By V=IR,
if the circuit component doesnt change  i.e. R is constant,
than V increase, I increase,
eg. when R = 100ohm
100V = 1A x 100Ohm
1000V = 10A x 100Ohm

When Transporting electricity,
the power(energy carried) of the electricity is the same,
P=IV
100 = 100 x 1
100 = 10 x 10  etc


4. Circuit個Charge同Stactic個Charge係1樣定唔同? If唔同﹐有咩唔同?
<<<<<<
More or less the same.
The main difference is that,
electrons in electrostatic is static,
but in complete circuit, they flow around the circuit.

[ Last edited by 鬼鬼 on 2005-6-20 at 03:51 AM ]

dolphin_ice

Oh I see~

thanks :D