Igcse Model Questions Vol1 2022 Physics Question 8
Practice objective / multiple choice question 8 from the 2022 Igcse Model Questions Vol1 Physics examination.
A circular coil of \(200\) turns and radius \(5.0\ \text{cm}\) rotates uniformly in a uniform magnetic field of magnitude \(0.80\ \text{T}\). The coil is connected to a resistor of \(10\ \Omega\). (a) If the average power dissipated in the resistor is \(2.5\ \text{W}\), find the rotation frequency in revolutions per second. (b) The coil radius is then increased by \(20\%\) while the number of turns and the power remain the same. What magnetic‑field strength is now required? Give your answers to two significant figures.
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About This Question
This is Igcse Model Questions Vol1 2022 Physics Question 8. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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