Portable Instrument - When is the effect of stray magnetic field on actuating torque maximum?

Q.  In a portable instrument, the effect of stray magnetic field on actuating torque will be maximum when the operating field and stray fields are
- Published on 15 Sep 15

a. Parallel to each other
b. Perpendicular to each other
c. Inclined at 45 degree
d. Opposite to each other

ANSWER: Parallel to each other

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