1: Kirchhoff’s laws and circuits

sigma I in = sigma I out

kirchhoff’s first law states that ______

in any circuit, the sum of the electromotive forces is equal to the sum of the p.d.s around a closed loop

kirchhoff’s second law states that _____

it takes the law of conservation of energy and applies it to electrical circuits

kirchhoff’s second law also uses ____ law

sigma E (e.m.f) = sigma V around a closed loop

kirchhoff’s second law in an equation is ____

the same in every positon

in a series circuit the current is _____

the e.m.f

the sum of p.d.s across the components is always equal to _____

the same rule applies

in sources with more than one source of e.m.f, ___

opposing polarities

the sources of e.m.f are connected with ____

E1-E2

sum of emf’s is equal to ____

separate circuit

each parallel branch can be thought of as a _____

the other branches aren’t affected

in a parallel circuit, if changes are made to one branch, ____

the total p.d. Across each branch is equal to the e.m.f from the power supply

Kirchhoff’s second law tells that in parallel circuits ____

E.m.f no matter how many branches there are

In parallel circuits the p.d. Across each branch is the same as the___

The e.m.f as in a series circuit

In a parallel circuit, if there is more than one component on a branch, then within that branch the sum of p.d.s across the components must be equal to ___