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how to read a CRO

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XaM!!:
may june 03 ques 26
oct 04 ques 5... plz help because m stil confuse...

sabrina:
hi i m not a good explaner but i will try to help u
whenever frency question comes use the formula 1/T. T stands for time period.
but how to find time period? i m coming to the point. use the formula time period=time base*no of boxes for 1 complete wave.
time period here is 2.5/1000(change to metre)*4=0.01
frequency=1/.01=100.
so the answer is B
hope u understood

halosh92:

--- Quote from: XaM!! on May 18, 2010, 12:31:27 pm ---may june 03 ques 26
oct 04 ques 5... plz help because m stil confuse...

--- End quote ---

ok c:
for one  cm square its 2.5ms
one complete wave takes 4 squares right
so:
1cm ------------------ 2.5 ms
4cm--------------------x
x=10 ms   (this is microsecond convert to seconds by dividing by 1000)
x=0.01 s
f=1/t   this is the equation relating frequnecy and time
f=1/0.01 =100 hertz
got it?

XaM!!:
Thanks a lot guys... Thanks a ton...

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