Physics (AS & A Level) · Oct / Nov 2019 · Paper 13 · Question 37

Which row correctly describes Kirchhoff's laws?

1. AKirchhoff's first law: The sum of the currents entering a junction equals the sum of the currents leaving the junction. | physics principle applied for first law: conservation of charge | Kirchhoff's second law: The sum of the e.m.f.s around any closed loop in a circuit equals the sum of the p.d.s around the same loop. | physics principle applied for second law: conservation of energy
2. BKirchhoff's first law: The sum of the currents entering a junction equals the sum of the currents leaving the junction. | physics principle applied for first law: conservation of energy | Kirchhoff's second law: The sum of the e.m.f.s around any closed loop in a circuit equals the sum of the p.d.s around the same loop. | physics principle applied for second law: conservation of charge
3. CKirchhoff's first law: The sum of the e.m.f.s around any closed loop in a circuit equals the sum of the p.d.s around the same loop. | physics principle applied for first law: conservation of energy | Kirchhoff's second law: The sum of the currents entering a junction equals the sum of the currents leaving the junction. | physics principle applied for second law: conservation of charge
4. DKirchhoff's first law: The sum of the e.m.f.s around any closed loop in a circuit equals the sum of the p.d.s around the same loop. | physics principle applied for first law: conservation of charge | Kirchhoff's second law: The sum of the currents entering a junction equals the sum of the currents leaving the junction. | physics principle applied for second law: conservation of energy

As printed in the paper