Electric machinery fundamentals
5th Edition
ISBN: 9780073529547
Author: Chapman, Stephen J.
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Question
Chapter 1, Problem 1.18P
(a)
To determine
The value of complex power S consumed by the load.
(b)
To determine
Whether the load is capacitive or inductive.
(c)
To determine
The power factor of the load
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Assume that the voltage applied to a load is V = 2082-30° V and the current flow-
ing through the load is I = 5Z15° A.
(a) Calculate the complex power S consumed by this load.
(b) Is this load inductive or capacitive?
a) why is there a wattmeter reading when the load is purely inductiveb) why is there no wattmeter reading when the load is purely capacitive
Answer the following:
a. A capacitance is connected to a 115 V, 25 Hz mains and takes a current of 5 A. find the current when both the capacitance and frequency are doubled.
b. A 220 V, 60 Hz circuit draws a current of 11 A with a power factor of 0.8 lagging. Find the resistance of the circuit.
Chapter 1 Solutions
Electric machinery fundamentals
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