Question
Download Solution PDFWhat will be the deflection (in rad) of a moving iron instrument, when the inductance of the moving iron instrument is (20 + 4θ) μH, where θ is the deflection in radian from zero position and the deflection current is 5 A? Assuming spring constant k = 10 × 10-6 Nm/rad.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Operating torque:
In moving iron instruments, the deflecting torque is given by
I is the operating current in Ampere
L is the inductance in Henry
θ is the deflection angle in radians
Deflection is directly proportional to the square of the RMS value of the operating current. Hence, this instrument possesses high operating torque.
Calculation:
Last updated on Jul 1, 2025
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