The self and mutual inductances of a doubly excited magnetic system are Ls=0.6+0.20cos2 r H and Lr=0.75+0.30cos2 r H and Msr=0.8cos r H. For a stationary rotor at an angular position of r=60 ,what is the magnitude of torque when the currents is=20A DC and ir=10A DC?

The self and mutual inductances of a doubly excited magnetic system ar

1.	The self and mutual inductances of a doubly excited magnetic system are L_s=0.6+0.20cos2 _r H and L_r=0.75+0.30cos2 _r H and M_sr=0.8cos _r H. For a stationary rotor at an angular position of _r=60 ,what is the magnitude of torque when the currents i_s=20A DC and i_r=10A DC?
A.	-233.88N-m
B.	+233.88N-m
C.	-467.76N-m
D.	+467.76N-m
Answer» B. +233.88N-m

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The self and mutual inductances of a doubly excited magnetic system are Ls=0.6+0.20cos2 r H and Lr=0.75+0.30cos2 r H and Msr=0.8cos r H. For a stationary rotor at an angular position of r=60 ,what is the magnitude of torque when the currents is=20A DC and ir=10A DC?

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The self and mutual inductances of a doubly excited magnetic system are L_s=0.6+0.20cos2 _r H and L_r=0.75+0.30cos2 _r H and M_sr=0.8cos _r H. For a stationary rotor at an angular position of _r=60 ,what is the magnitude of torque when the currents i_s=20A DC and i_r=10A DC?