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the armature of a DC motor has 20Ω resistance .it draws a current of 1.5 A when run by a 220 V DC suooly.the value of back emf induced in it ,is_____

the armature of a DC motor has 20Ω resistance .it draws a current of 1.5 A when run by a 220 V DC suooly.the value of back emf induced in it ,is_____

Grade:12

1 Answers

Vikas TU
14149 Points
5 years ago
Dc Motor would take voltage from source to get enrgised. Hence after kvl the eqn. we would get is:
Ea = 220 – IR => 220 – 1.5*20 = > 220 – 30 = 190 Volts.

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