Neco Model Questions Vol1 2020 Physics Question 15
Practice objective / multiple choice question 15 from the 2020 Neco Model Questions Vol1 Physics examination.
A battery of emf \(E = 12\,\text{V}\) has an internal resistance \(r\). It is connected to an external circuit consisting of two resistors \(R_{1}=6\,\Omega\) and \(R_{2}=12\,\Omega\) connected in parallel. The terminal voltage across the external circuit is measured to be \(9\,\text{V}\). Determine (a) the internal resistance \(r\) of the battery (in ohms), (b) the total current supplied by the battery (in amperes), (c) the power dissipated in the internal resistance (in watts), and (d) the efficiency of the battery (percentage of the total power delivered to the external circuit).
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About This Question
This is Neco Model Questions Vol1 2020 Physics Question 15. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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