Unit 4                                                             

1270                                                      PRACTICE EXAM                                                             

 

1.      (20 points)

 

         Evaluate the following:

 

a.                                    e.    

 

b.      The polar form of                     f.     =

 

c.      The rectangular form of =             g.    Absolute magnitude of

 

d.      =                                        h.    Rationalize

 

 

 

2.         (30 points)

 

                                       

                                                vg(t) = 200 sin (1000t - 30°)V

 

            Choose an R, an L, or a C to be placed in the dashed-line box to make

                                                      v(t) = Vn sin (1000t)V

 

            where Vn is a real constant. State the value of the component you choose. With your component in the circuit, calculate the resulting value of Vn.

3.         (25 points)

 

                       

 

                                                     vs(t) = 100 cos (104t) V

                                                    is(t) = sin (104t) A

 

            a.      Find a numerical, time-domain expression for vo(t).

            b.      Show Vo on a phasor diagram.

 

4.         (25 points)

 

                      

 

         Construct a frequency-domain Thevenin's equivalent circuit at the terminals a-b.