Question

Time taken by ac to reach half of its max value is ___while initial phase of ac is 90

Answer 1

Answer:

60 cycles in an AC sine wave, means that the system is operating with a supply that has a frequency of 60hz = 60 cycles per second. Therefore, the cycle time for such a system is 1/60 seconds (16.67 ms). Each cycle comprises, one positive going voltage duration and one negative going voltage duration.

Answer 2

Answer:

T/6

Explanation:

x=x▪coswt

where x= half of maximum value that will be x▪/2

x▪/2=x▪coswt

1/2=coswt

cos^-1 ( 1/2)=2pi/T×t

pi/3= 2pi/T×t

1/3=2/T×t

t=T/6

hope so it will be beneficial...its mdcat physics question..I was finding the solution of this question a few minutes before but couldn't find..

so, as I solved it ,shared with you..but I think it's late now.