Igcse Model Questions Vol1 2023 Physics Question 15
Practice objective / multiple choice question 15 from the 2023 Igcse Model Questions Vol1 Physics examination.
A \(12\ \text{V}\) battery with internal resistance \(r\) supplies a circuit containing two resistors, \(R_1 = 4\ \Omega\) and an unknown \(R_2\), connected in parallel. The total current drawn from the battery is \(3.0\ \text{A}\). When a second identical \(12\ \text{V}\) battery (same internal resistance \(r\)) is connected in series with the first, the total current rises to \(4.5\ \text{A}\). Determine the values of \(R_2\) (in \(\Omega\), to the nearest whole number) and the internal resistance \(r\) (in \(\Omega\), to two decimal places).
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About This Question
This is Igcse Model Questions Vol1 2023 Physics Question 15. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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