Question 1
- State Kirchhoff’s Voltage Law.
- Using Fig. 1, calculate:
- Algebraic sum of the e.m.fs;
- Total resistance (R) in the circuit
- Current (I) flowing through the circuit
Observation
The expected responses were:
- Kirchhoff’s Voltage law states that in a closed loop, the algebraic sum of the electromotive force acting around a loop is equal to the potential difference around the loop.
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- Algebraic sum of e..m.f.
- Total resistance
- Current
Many of the candidates who attempted this question did not know the importance of e.m.fs, and the difference between e.m.f and voltage drop. Computing total resistance of a series-parallel resistive circuit was difficult for them.