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Problem: Draw the phasor for the emf = (170 V) cos ((2π*60 Hz)t) at t = 60 ms. Tail at the origin.

FREE Expert Solution

Instantaneous emf is generally expressed as:

ε=ε0cosωt

The angle, 

θ = ωt = 2πft = (2π)(60)(60 × 10-3) = 22.62 rad 

22.62 rad = (22.62rad)(180°/π rad) = 216°

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Problem Details

Draw the phasor for the emf = (170 V) cos ((2π*60 Hz)t) at t = 60 ms. Tail at the origin.

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