The inductance of a certain moving- iron ammeter is expressed as L = 10 + 3θ – \frac{θ^2}{4} μH, where θ is the deflection in radian from the zero position. The control spring torque is 25 × 10^-6 Nm/rad. If the meter is carrying a current of 5 A, the deflection is ____________
(a) 2.4
(b) 2.0
(c) 1.2
(d) 1.0
This question was posed to me by my college director while I was bunking the class.
This intriguing question comes from Advanced Problems on Magnetically Coupled Circuits topic in chapter Resonance & Magnetically Coupled Circuit of Network Theory
Select the correct answer from above options
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