Neco Model Questions Vol1 2021 Physics Question 42
Practice objective / multiple choice question 42 from the 2021 Neco Model Questions Vol1 Physics examination.
A rectangular coil of dimensions \(a=5\,\text{cm}\) and \(b=10\,\text{cm}\) rotates in a uniform magnetic field \(B=0.20\,\text{T}\). The coil has \(N\) turns and is connected to a resistor of \(R=20\,\Omega\). The coil is rotated at a constant angular speed \(\omega\) (rad s⁻¹). The average electrical power dissipated in the resistor is required to be \(0.50\,\text{W}\). Determine the smallest integer value of \(N\) that allows this power while keeping the angular speed \(\omega\) at or below \(100\,\text{rad s}^{-1}\). Give the corresponding angular speed (to the nearest rad s⁻¹) and the number of turns.
Answer Options
About This Question
This is Neco Model Questions Vol1 2021 Physics Question 42. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.