Wednesday, 17 September 2014

ALTERNATING CURRENT


1. Obtain an expression for resonant frequency fo of a L.C.R series resonance circuit.
2. Obtain the relation i=io sin(wt - B/2) for a pure inductor connected across A.C voltage  
E= Eo Sinwt.
3. Obtain the relation i=io sin(wt + B/2) for a pure capacitor connected across A.C voltage  
E= Eo Sinwt.
4. Show that average power consumed in A. C  ciruit is  
       P= E rms x I rms x cos M
5. A Sinusoidal voltage V = 200 sin 314t is applied to a 10ohm resistor.
            Find a) frequency of the supply       (50Hz)
                    b) Pear voltage                                              (200 V)
                       c) rms voltage                              ( 141.4 V)
                       d) rms current                                            ( 14.14 A)
                       e) power dissipated                                ( 2000 W)