An square ammeter coil has 80 turns of wire each of area 16.0cm^2. It is pivoted in a radial magnetic field of intensity 0.25T.
a) Calculate the magnitude of toque acting on the coil when 60mA flows through it.
My Working:
Torque = nBIACosθ
= 80 x 0.25 x 0.06 x (0.16)^2
= 0.03072
***********************************
The books answer states that the magnitude of the torque is 1.92x10^-3
Can anyone tell me where I'm going wrong, or is the books answer wrong?
Thanks
a) Calculate the magnitude of toque acting on the coil when 60mA flows through it.
My Working:
Torque = nBIACosθ
= 80 x 0.25 x 0.06 x (0.16)^2
= 0.03072
***********************************
The books answer states that the magnitude of the torque is 1.92x10^-3
Can anyone tell me where I'm going wrong, or is the books answer wrong?
Thanks