A-LevelPhysicsD.C. circuitsFeb/Mar 2022Paper 1 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
The correct answer is A. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep