Basic Electronics Paper 2, WASSCE (PC 2ND), 2018

Question 2

       

(a)        State one difference between direct current and alternating current.
(b)        Fig. 1 is a series RL circuit.

 

Calculate the:
(a)      inductive reactance;
(b)      impedance;
(c)      phase angle.  

  

 

The expected responses were:

  1. Differences between direct current and alternating current


    Direct current

    Alternating current

    Has steady magnitude/amplitude

    Varies in magnitude/amplitude

    Does not change in polarity

    Periodically changes in polarity

    Has no frequency

    Has frequency

  2.