For a dynamometer wattmeter, the variation of inductance with angular – McqOptions

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1.	For a dynamometer wattmeter, the variation of inductance with angular position of moving system is 0.06 mH/radian and spring constant is 10 X 10 N-m/radian. The current flowing in the instrument is 8 A. If the full scale deflection is 76 degree, then the current required in the voltage coil at full scale on d.c. circuit is
A.	27.6 A
B.	29.89 A
C.	35.3 A
D.	37.28 A
Answer» B. 29.89 A

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