Question... bit tricky (1 Viewer)

[currysauce]

The current of an a.c source reverses its polarity every 0.010 micro seconds. THe wavelength of the radio waves produced is what?

 

[rukie]

Im not entirely sure, but i came across a similar question so ill use the same method

Well, it changes polarity every 0.01 microseconds, so for a full cycle, it must change polarity twice, so double that you get 0.02, thers your period, frequency = 1/p = 5x10^7 Hz (changing microsecs to seconds)

Using wavelength = c/frequency u get 6 m

 

[currysauce]

well done

nice work

 

[Jago]

wow...that's clever

 

[powerhouse]

I never saw the Period = 1 / frequency formula in the syllabus.

 

[Xayma]

Well you don't see the axioms for maths either. You should know it by now.

 

[helper]

I never saw the Period = 1 / frequency formula in the syllabus.

Its not a formula given but is assumed knowledge from the year 11 section on the world communicates.

 

[jarro_2783]

even if you don't know that formula, think about it this way.

frequency is cycles per second. So you know that one cycle is 0.02 micro seconds.
ie: f = 1 (cycle) / 0.02 (microseconds), convert to seconds and just do that division.

You can use that for any measurement per another measurement calculation like metres per second, watts per metre or whatever. If you've got one measurement per another measurement and you know a value for both, just put it in the calculator and that is your answer for the first measurement per unit of the second one.