Permanent magnet moving coil instrument - deflecting torque?

Q.  In a permanent magnet moving coil instrument, the deflecting torque is
- Published on 10 Sep 15

a. Directly proportional to both number of turns and flux density
b. Directly proportional to the number of turns and inversely proportional to the flux density
c. Inversely proportional to the number of turns and directly proportional to the flux density
d. Inversely proportional to both number of turns and flux density

ANSWER: Directly proportional to both number of turns and flux density

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    Discussion

  • kiran chilkawar    -Posted on 26 Jan 17
    Td=BINA
    where B=flux density
    N= no of turns
    A=area of coil
    I=current through coil
    when I and A constant
    Td is directly praportional to B and N

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