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Series & Parallel circuits help

I always get these questions wrong lol could some one help explain how to get each one? Only one I know is I3 because of Kirchhoff's first law.
Circuits help.png24.8KB
Original post by KINGYusuf
I always get these questions wrong lol could some one help explain how to get each one? Only one I know is I3 because of Kirchhoff's first law.


You understand that the current entering a circuit must equal the current coming out of a circuit, so the current entering a junction in a circuit must equal the current flowing out of the junction.

30mA = 20mA + I1

20mA = 15mA + I2
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KINGYusuf
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Original post by pineneedles
You understand that the current entering a circuit must equal the current coming out of a circuit, so the current entering a junction in a circuit must equal the current flowing out of the junction.

30mA = 20mA + I1

20mA = 15mA + I2


Thanks
Original post by KINGYusuf
I always get these questions wrong lol could some one help explain how to get each one? Only one I know is I3 because of Kirchhoff's first law.


Hey, may I know which paper this is from? :smile:
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KINGYusuf
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Original post by thymolphthalein
Hey, may I know which paper this is from? :smile:


Forgot bro soz one of the early ones I think
Original post by KINGYusuf
Forgot bro soz one of the early ones I think


Ahah, nvm found it just now.

Jan 2009, apparently.

Thanks anyway. :h:

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