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A 4-pole Dc wound machine is lap wound with 400 conductors. The pole shore is 20 cm long and average flux density over one-pole pitch is 0.4 T, the armature diameter being 30 cm. What is the value of induced emf?

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A 4-pole Dc wound machine is lap wound with 400 conductors. The pole shore is 20 cm long and average flux density over one-pole pitch is 0.4 T, the armature diameter being 30 cm. What is the value of induced emf?

(a) 188 V

(b) 276 V

(c) 94 V

(d) 188 mV

I have been asked this question in homework.

The question is from EMF and Torque Production in chapter Circuit Model, Emf and Torque of DC Machines

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Best answer
The correct option is (a) 188 V

The best explanation: Induced emf in a DC machine is equal to,

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