Gce Model Questions Vol1 2025 Physics Question 47
Practice objective / multiple choice question 47 from the 2025 Gce Model Questions Vol1 Physics examination.
A rectangular coil of \(N = 100\) turns and area \(A = 0.010\ \text{m}^{2}\) rotates in a uniform magnetic field of magnitude \(B = 0.60\ \text{T}\). The coil has an internal resistance of \(r = 2\ \Omega\). It is driven so that its angular speed increases uniformly from rest to \(\omega_{\max}=50\ \text{rad s}^{-1}\) over a time interval of \(T = 5\ \text{s}\) (i.e., angular acceleration \(\alpha = 10\ \text{rad s}^{-2}\)). The coil is connected to an external load resistor \(R\). Determine the value of \(R\) that maximises the average power dissipated in the load during the 5 s interval.
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This is Gce Model Questions Vol1 2025 Physics Question 47. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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