A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2Ω. It is braked by plugging. The resistance to being connected in series a with the armature to restrict armature current to 10 A, is
1
32 Ω
2
36 Ω
3
38 Ω
4
40 Ω