Question

A 4-pole, DC generator with wave wound armature has 50 slots containing 18 conductors in each slot. The induced emf is 357 volts and the speed is 9000 rpm. The flux per pole will be

• A. 1.32 mWb
• B. 3.6 mWb
• C. 4.8 mWb
• D. 5.2 mWb

Answer 1

The correct option is A 1.32 mWb

$\text{We know that, emf generated,}$
$E=\frac{P\varphi NZ}{60A}=\varphi \times 50\times 18\times \frac{9000}{60}\times \frac{4}{2}$

$357=\varphi \times 50\times 18\times \frac{9000}{60}\times \frac{4}{2}$

$\text{Flux per pole,}\varphi =1.32\text{mWb}$