Page 240 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

2
S P Q 2

2
S P Q 2
V I V I
m m (Sin2ωS m m Sin2ω V I Sin2ω
2 V 2 I 2 V RMS RMS

I

m m (Sin2ωS m m Sin2ω V I Sin2ω
2 2 2 RMS RMS

Power to an inductive load
Consider the following circuit where

i = I sin at
m

Work – The work is said to be done when a force acting on a body causes it to move. The work done can be
calculated by the product of force and the displacement of the point of application in the direction of force.
So work done = force x distance
The unit of work in M.K.S. system is joule

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CITS : Power - Electrician & Wireman - Lesson 38-40 CITS : Power - Electrician & Wireman - Lesson 38-40