Question

The power factor of the load is

• A. 0.45
• B. 0.50
• C. 0.55
• D. 0.60

Answer 1

The correct option is A 0.45



$V_1^2=V_2^2+V_3^2+2V_2{V}_{3}cos\varphi$

$(220{)}^2=(122{)}^2+(136{)}^2+2\times 122\times 136\times cos\varphi$

$\Rightarrow cos\varphi =0.45$