A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2022 · Q351 Mark
Each of Kirchhoff's two laws presumes that some quantity is conserved. Which row states Kirchhoff's first law and names the quantity that is conserved? statement quantity A the algebraic sum of currents into a junction is zero charge B the algebraic sum of currents into a junction is zero energy C the e.m.f. in a loop is equal to the algebraic sum of the product of current and resistance round the loop charge D the e.m.f. in a loop is equal to the algebraic sum of the product of current and resistance round the loop energy
Athe algebraic sum of currents into a junction is zero, charge
Bthe algebraic sum of currents into a junction is zero, energy
Cthe e.m.f. in a loop is equal to the algebraic sum of the product of current and resistance round the loop, charge
Dthe e.m.f. in a loop is equal to the algebraic sum of the product of current and resistance round the loop, energy
✓ Correct answer
A: the algebraic sum of currents into a junction is zero, charge
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