Igcse Model Questions Vol1 2025 Physics Question 3
Practice objective / multiple choice question 3 from the 2025 Igcse Model Questions Vol1 Physics examination.
A battery of emf \(E\) volts and internal resistance \(r\ \Omega\) is first connected to a single external resistor \(R_{1}=4\ \Omega\). The terminal voltage measured across the battery is \(12\ \text{V}\). When a second resistor \(R_{2}=6\ \Omega\) is connected in parallel with \(R_{1}\), the terminal voltage falls to \(10\ \text{V}\). Determine the values of \(E\) and \(r\). Then calculate the power dissipated in \(R_{2}\) under the second condition.
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This is Igcse Model Questions Vol1 2025 Physics Question 3. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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