Basic Electricity 2, WASSCE (PC 2ND), 2019

Question 2

 

A resistor of 15 Ω, an inductor of 0.318 H and a capacitor of 150µF are connected in series across a 240 V, 50 Hz a.c. supply. Calculate the:

  1. impedance of the circuit;
  2. current;
  3. voltage across each component.

Observation

The expected responses were:

 

  1.  

  2.  

  3.  

Many of the candidates who attempted this question did not know how to compute reactance from capacitance and reactance without which impedance, current and voltage cannot be computed.