Question

If two current phasors, having magnitude 12A and 5A intersect at an angle of 90 degrees, calculate the resultant current.

(a) 13 A

(b) 10 A

(c) 6 A

(d) 5 A

This question was posed to me in quiz.

I want to ask this question from Phasor Diagrams Drawn with RMS Values Instead of Maximum Values in division Alternating Voltage and Current of Basic Electrical Engineering

Answer 1

Right choice is (a) 13 A

The best explanation: Using the parallelogram law of addition,  I^2 = I1^2 + I2^2 + 2I1I2 cosθ

I=13 A.