Igcse Model Questions Vol1 2021 Physics Question 16
Practice objective / multiple choice question 16 from the 2021 Igcse Model Questions Vol1 Physics examination.
An ideal battery of emf \(E\) volts and internal resistance \(r\) ohms is connected to a circuit as follows. A resistor \(R_{1}=6\ \Omega\) is attached to the battery terminals. When only \(R_{1}\) is connected, the current measured is \(2.0\ \text{A}\). A second resistor \(R_{2}\) (unknown resistance) is then connected in parallel with \(R_{1}\). With both resistors present the current increases to \(2.5\ \text{A}\) and the power dissipated in \(R_{2}\) is measured to be \(6\ \text{W}\). Determine the emf \(E\) of the battery, its internal resistance \(r\), and the value of \(R_{2}\).
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About This Question
This is Igcse Model Questions Vol1 2021 Physics Question 16. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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