waecE-LEARNING
Applied Electricity Paper 2 , Nov/Dec. 2014  
Questions:   1 2 3 4 5 6 7 Main
General Comments
Weakness/Remedies
Strength




























Question 7

(a) Define the capacitance of a capacitor.
(b) (i) List three types of capacitor.
(ii) State two applications of a capacitor.
(c) Write the equivalent capacitance of two capacitors connected in:
(i) series;
(ii) parallel.



 


 

_____________________________________________________________________________________________________
Observation

The expected answers were:
(a) Capacitance of a capacitor is the ability of a capacitor to store electric charges.
OR
Capacitance of a capacitor is the ratio of the quantity of charge to the potential difference across the terminals of the capacitor.
OR
C = where Q is the quantity of charge and V is the potential difference across the terminals of the capacitor.

(b) (i) Any three types of capacitor
Paper Ceramic
Electrolytic Mica
Air capacitor Polyester

(ii) Any two applications of capacitor
Power factor correction
Starting of single phase motor
Blocking of direct current
Decoupling
Stores charges
Smoothening
Filtering
Tuning circuit

(c) (i) =
=
(ii) = +

The question was on Magnetic Field and Electromagnetism. The question
was not well attempted by candidates. The few candidates who
attempted this question could not define capacitance, list types of capacitor and
state applications of a capacitor.



 

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