In a DC machine, the pole core is usually of smaller cross section than the pole shoe because __________?

larger pole shoe reduces the mechanical strength

smaller cross section requires less copper

larger pole shoe increases the air gap reluctance

larger pole shoe increases the flux per pole entering the armature

In a DC machine, the pole core is usually of smaller cross section tha

1.	In a DC machine, the pole core is usually of smaller cross section than the pole shoe because __________?
A.	smaller cross section requires less copper
B.	larger pole shoe increases the air gap reluctance
C.	larger pole shoe increases the flux per pole entering the armature
D.	larger pole shoe reduces the mechanical strength
Answer» D. larger pole shoe reduces the mechanical strength