Igcse Model Questions Vol1 2025 Physics Question 21
Practice objective / multiple choice question 21 from the 2025 Igcse Model Questions Vol1 Physics examination.
A battery of emf \(20.0\ \text{V}\) and internal resistance \(r\) supplies a circuit consisting of a \(6.0\ \Omega\) resistor in series with a parallel combination of a \(3.0\ \Omega\) resistor and an unknown resistor \(R_{x}\). The total current drawn from the battery is \(2.00\ \text{A}\), and the power dissipated in the \(3.0\ \Omega\) resistor is \(9.00\ \text{W}\). Determine the internal resistance \(r\) of the battery (give your answer to two decimal places).
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About This Question
This is Igcse Model Questions Vol1 2025 Physics Question 21. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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