Kirchhoff 39-s Laws Questions And Answers Pdf A Level Apr 2026

( 6 = 1I_2 + 3(I_2 - I_1) ) ( 6 = 4I_2 - 3I_1 ) … (2)

( 12 = 2I_1 + 3(I_1 - I_2) ) ( 12 = 5I_1 - 3I_2 ) … (1) kirchhoff 39-s laws questions and answers pdf a level

(b) & (c) require solving two loop equations: Loop1 (left): ( 12 = 3I_1 + 2(I_1 + I_2) ) Loop2 (right): ( 8 = 5I_2 + 2(I_1 + I_2) ) Solve → ( I_1 \approx 2.36A, I_2 \approx 0.55A ) Current through R₃ = ( I_1 + I_2 \approx 2.91A ) Terminal p.d. of battery A = ( 12 - I_1 \times 1 \approx 9.64V ) | Law | Statement | Conserves | |-----|-----------|------------| | First (Current) | ΣI_in = ΣI_out | Charge | | Second (Voltage) | Σε = ΣIR | Energy | ( 6 = 1I_2 + 3(I_2 - I_1)