You are Here: Home

# Kirchoffs laws

Physics and electronics discussion, revision, exam and homework help.

Announcements Posted on
Find out how cards are replacing warnings on TSR...read more 03-12-2013
1. Kirchoffs laws
For the Edexcel AS exam, do you have to know the Kirchoffs laws? I know the simplified principles eg:

The sum of the EMF around a circuit loop = sum of the PD around the loop

But I know that wouldn't be the way you write it if they asked for it in the exam. So do you have to learn the exact law?
2. Re: Kirchoffs laws
Try and find a mark scheme with that question in and see what variations they accept?
3. Re: Kirchoffs laws
To be honest i think that definition would be enough to get full marks. Don't take my word for it but i'm not sure how much more you can add to it.
4. Re: Kirchoffs laws
Kirchhoff’s first law: the total current arriving at a junction in a circuit must equal the total current leaving the junction.

Kirchhoff’s second law: The sum of the potential differences round any closed loop in a circuit must be zero.

Those definitions should be good.
5. Re: Kirchoffs laws
(Original post by james1211)
Try and find a mark scheme with that question in and see what variations they accept?
True, should have thought of this

(Original post by torakrubik)
To be honest i think that definition would be enough to get full marks. Don't take my word for it but i'm not sure how much more you can add to it.
Thank you..
(Original post by 117r)
Kirchhoff’s first law: the total current arriving at a junction in a circuit must equal the total current leaving the junction.

Kirchhoff’s second law: The sum of the potential differences round any closed loop in a circuit must be zero.

Those definitions should be good.
Thanks

## Step 2: Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank

this is what you'll be called on TSR

2. this can't be left blank

never shared and never spammed

3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

2. Slide the button to the right to create your account

You don't slide that way? No problem.

Last updated: April 17, 2012
Study resources
Moderators

We have a brilliant team of more than 60 volunteers looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is moderated by:
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.
Post rating score:
These scores show if a post has been positively or negatively rated by our members.