Question

Calculate the resistance offered by 3 HP water pump which runs on 220 V supply

• A. 21.63 $\Omega$
• B. 42.6 $\Omega$
• C. 63.2 $\Omega$
• D. 37.6 $\Omega$

Answer 1

The correct option is A 21.63 $\Omega$

Power$=P=3HP=3\times 746W=2238W$

And, $p=\frac{V^2}{R}$

$⟹R=\frac{V^2}{P}=\frac{220\times 220}{2238}$

$⟹R=21.63\Omega$

Answer-(A)