A sinusoidal alternating current is represented by the equation: i = 115 sin 311.24t A (1) Calculate the time taken from t = 0 seconds for the current to reach a value of 6.75 A for the second time. (2) Calculate the energy dissipated when the current flows through a 22 O resistor for one hour.

A sinusoidal alternating current is represented by the equation: i = 115 sin 311.24t A (1) Calculate the time taken from t = 0 seconds for the current to reach a value of 6.75 A for the second time. (2) Calculate the energy dissipated when the current flows through a 22 O resistor for one hour.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 7RQ

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Question

A sinusoidal alternating current is represented by the equation:
i = 115 sin 311.24t A
(1) Calculate the time taken from t = 0 seconds for the current to reach
a value of 6.75 A for the second time.
(2) Calculate the energy dissipated when the current flows through a 22
O resistor for one hour.

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