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With reference to the given phasor diagram, current I1 is the phasor sum of:

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HPCL Engineer Electrical 01 Nov 2022 Official Paper
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  1. I'1 and I2
  2. I0, I'1 and I2
  3. I'1 and I0
  4. I0 and I2

Answer (Detailed Solution Below)

Option 3 : I'1 and I0
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Detailed Solution

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The correct answer is option 3): (I'1 and I0)

Concept:

A phasor is a vector representation of a sinusoidal function that has both a magnitude and a phase angle.

Representations: Rectangular form:

z = x + jy

Polar form:

z = r ∠ ϕ

Exponential form: z = z ejϕ

when two phasors Ia and If added resultant will be Il as shown figure

By comparing it with given figure

we can say phasor diagram, current I1 is the phasor sum of I'1 and I0

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