A 60 cycle current has a maximum value of 6.5A. What will be the instantaneous value of current at (a)0.0035 sec after the wave passes through zero in a positive direction (b)0.01153 sec after the wave passes through zero in a positive direction

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter3: Static Electricity
Section: Chapter Questions
Problem 7RQ: A thundercloud has a negative charge, and an object on the ground has a positive charge. Will the...
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Solve the following problems completely. Box your final answer/s. Rounding off should only be done on your final answers with four decimal places only. Use engineering lettering and avoid erasures.

1. A 60 cycle current has a maximum value of 6.5A. What will be the instantaneous value of current at (a)0.0035 sec after the wave passes through zero in a positive direction (b)0.01153 sec after the wave passes through zero in a positive direction 2. A sinusoidal voltage having a effective value of 120V is impressed across a 50 ohms resistor. Calculate the rms and maximum value of current.

3.Calculate the average voltage induced in a coil of 300 turns through which the flux changes from 250,000 to 20,000 maxwells in 0.15 sec. 

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