trigonometrical expressions for the instantaneous values of p.d. and the current at time t. Calculate the instantaneous values at the instant t=0.015s and find the angle of phase difference between the p.d. and the current.

trigonometrical expressions for the instantaneous values of p.d. and the current at time t. Calculate the instantaneous values at the instant t=0.015s and find the angle of phase difference between the p.d. and the current.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.3P: The instantaneous voltage across a circuit element is v(t)=400sin(t+30)volts, and the instantaneous...

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Concept explainers

Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.

Question

100%

In a certain circuit supplied from 50 Hz mains, the potential difference has a
maximum value of 500V and the current has a maximum value of 10A. At the instant
t=0, the instantaneous values of the p.d. and the current are 400V and 4A
respectively, both increasing positively. Assuming sinusoidal variation, state
trigonometrical expressions for the instantaneous values of p.d. and the current at
time t. Calculate the instantaneous values at the instant t=0.015s and find the angle of
phase difference between the p.d. and the current. Sketch the phasor diagram (need
not be to scale).

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