Igcse Model Questions Vol1 2022 Physics Question 38
Practice objective / multiple choice question 38 from the 2022 Igcse Model Questions Vol1 Physics examination.
A battery of emf \(E\) V and internal resistance \(r\ \Omega\) supplies a circuit containing a motor that can be modelled as a resistor \(R_{\text{m}}\ \Omega\).\n\nWhen the motor is connected alone to the battery, it draws a current of \(2.0\ \text{A}\) and the terminal voltage across the motor is \(6.0\ \text{V}\).\n\nWhen a \(6\ \Omega\) resistor is added in series with the motor, the current falls to \(1.5\ \text{A}\).\n\nAssuming the motor's resistance does not change, determine (i) the emf \(E\) of the battery, (ii) the internal resistance \(r\), and (iii) the resistance of the motor \(R_{\text{m}}\).
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About This Question
This is Igcse Model Questions Vol1 2022 Physics Question 38. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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