Untitled picture.png Machine generated alternative text: Example 1.1 Find the frequencyf, period Tof the voltage waveforms given below. Also find the phase angle between VI(t) and V2(t). Does VI(t) lead or lag V2(t) ? (i) VI (t) = 12 sin(314t + 450) and V2(t) = 6 sin(314t — 150) (ii) VI(t) = 12 sin(314t + 450) and V2(t) = 6 cos(314t — 1050) Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings Untitled picture.png Machine generated alternative text: Find the phase angle between il = —4 sin(100TTt + 250) and i2 = 5 cos(1007Tt — 400) . Does il lead or lag i2? Ink Drawings Ink Drawings Ink Drawings Ink Drawings Ink Drawings           Ink Drawings Ink Drawings Ink Drawings Ink Drawings    Ink Drawings Ink Drawings Ink Drawings Ink Drawings         Ink Drawings Ink Drawings Ink Drawings Ink Drawings           Exercises Wednesday, 20 February 2019 4:44 PM

 

Machine generated alternative text: QI: Consider the sinusoids 10 cos(200t + 45) and 5 sin(200t + 150) . Determine the time by which V2(t) is advanced or delayed with respect to Vl(t). Ans: vz(t) is delayed with respect to VI(t) by 10.47 ms

 

Machine generated alternative text: Find the average value for the following half-wave rectified sine wave. (t) = I'm sin(wt) 2m v(t) 2m eriod (T)

 

Untitled picture.png Machine generated alternative text: Q2: A sinusoidal current is given as 100 cos(5000zt - 135) mA Determine the period T and the time to at which the first positive peak occurs.      

Untitled picture.png Machine generated alternative text: Q3: Express the voltage shown in Figure 1 in general form given below: v(t) = + 4) Volts where v m 2 0 and — 1800 1800 v(t), mv 25 5 t ms Prof E Ambikairajah. UNSW, Australia Figure I Ans:Vm = 100m = -900 Useful Trigonometric Identities ± 1800) = — sine»t ± 1800) = — COS ± 900) = ± COS cot 90 ) 0 = F sin ("t 

 

 

       

    

   

 

 

  

 

 

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