✔ 最佳答案
The Current Is Small Not Equal To It Will Go Out,,
If The Small Current Pass The Filaments,,
The Filament Can't Produce Heat And Light,,
So You May Think That It Will Do Out,,
The Voltmeter Connect In Series,,
It Must Have A Large Resistance As 2M Ohms(2000000 Ohms),,
It Can Avoid Short Circuit,,
If A Large Resistance's Resistor Connect In Series,,
It Will Block The Current,,
It Only Pass Little Current Or No Current To The Filament,,
The Brightness Of The Bulb,,
It Refer To The Currrent,,
If The Current Is Large,,
It Can Produce Large Heat And Lighe To A Filament.
Why You Will Say Voltage Affect The Brigtness ??
It Is Because
If The Resistance Remain Unchange,,
Than The Current And Voltage Will Become Direct Proportion..
2009-04-18 23:09:04 補充：
So You May Think That It Will Do Out,, (Wrong)
So You May Think That It Will Go Out,,(Correct)
The Voltmeter Connect In Series,,(Wrong)
The Voltmeter Connect In Parallel,,(Correct)
2009-04-18 23:09:07 補充：
It Is Because
If The Resistance Remain Unchange,,
Than The Current And Voltage Will Become Direct Proportion..
(Ohm's Law)
So,,The Answer Is C..
2009-04-19 18:54:31 補充：
In series,,
The Currrent Of Each Loading Is The Same (Same With The Main Current),,
So The Current Of Series Is :
I=I1=I2=I3=I4......
By The Formula,,
The I Is Main Current,,
I1,,I2,,I3,,I4... Is The Current Of Each Loading
2009-04-29 23:17:44 補充：
This Circuit Is Combine With Parallel And Series
