Question Guide – DC Circuit – Potential Divider
Question:
The figure below shows a circuit that uses a potentiometer R2. The resistance of R2 is 10 Ω. R2 is divided into two sections, AX and XB, by the slider X. Section XB of R2 has a resistance of 3.2 Ω. The resistance of the lamp is also 3.2 Ω. Calculate the total resistance of the circuit.
The figure below shows a circuit that uses a potentiometer R2. The resistance of R2 is 10 Ω. R2 is divided into two sections, AX and XB, by the slider X. Section XB of R2 has a resistance of 3.2 Ω. The resistance of the lamp is also 3.2 Ω. Calculate the total resistance of the circuit.
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Observation:
Firstly, identify whether it is a series or parallel circuit overall.
Overall, it is a series circuit where the lower section contains a parallel sub-circuit.
Solution:
This question falls under the topic DC Circuit – Potential Divider in Physics tuition for O Level.
DC Circuit Potential Divider Sample Question and Solution ultima modifica: 2017-10-13T08:49:56+00:00 da