Gce Model Questions Vol1 2020 Physics Question 8
Practice objective / multiple choice question 8 from the 2020 Gce Model Questions Vol1 Physics examination.
A battery of emf \(\varepsilon = 24\ \text{V}\) and unknown internal resistance \(r\) is connected to a circuit as shown: a resistor \(R_1 = 4\ \Omega\) is in series with a parallel combination of a resistor \(R_2 = 6\ \Omega\) and a lamp of resistance \(R_L\). When the lamp is operating, the total current drawn from the battery is \(I = 3.0\ \text{A}\) and the lamp dissipates a power of \(12\ \text{W}\). Assuming the internal resistance is non‑zero, determine (a) the internal resistance \(r\) of the battery (in ohms, to two significant figures) and (b) the resistance \(R_L\) of the lamp (in ohms, to two significant figures).
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About This Question
This is Gce Model Questions Vol1 2020 Physics Question 8. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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