railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines DC Motor DC Motor Types

What is the relationship between the speed (N) and armature current (I_a) in case of dc-series motor?

1

N ∝ 1 / I_a

2

N ∝ √(I_a)

3

N ∝ I²_a

4

N = I_a

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