Neco Model Questions Vol1 2019 Physics Question 22
Practice objective / multiple choice question 22 from the 2019 Neco Model Questions Vol1 Physics examination.
A battery of emf \(E\) volts and internal resistance \(r\) \(\Omega\) is connected to an external circuit consisting of a 10 \(\Omega\) resistor in parallel with a variable resistor \(R\). When \(R = \frac{20}{3}\,\Omega\), the total current drawn from the battery is 3.0 A and the voltage across the 10 \(\Omega\) resistor is 12.0 V. When the variable resistor is changed to \(4\ \Omega\), the total current becomes 4.0 A. Determine the emf \(E\) of the battery (in volts).
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About This Question
This is Neco Model Questions Vol1 2019 Physics Question 22. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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