waecE-LEARNING
Applied Electricity Paper 2 , Nov/Dec. 2011  
Questions:   1 2 3 4 5 6   Main
General Comments
Weakness/Remedies
Strength










































Question 4

  1. Copy and complete Table 1.

                                           Table 1


Type of instrument

Quantity measured with the instrument

Method of control

Method of damping

Moving - coil

 

 

 

Moving - iron

 

 

 

             

 

  1.  State one application each of the following:
  2. an ammeter;
  3. an ohmmeter.

 


 

_____________________________________________________________________________________________________
Observation

The expected answers were:

  1.  

Type of instrument

Quantity measured with the instrument

Method of control

Method of damping

Moving - coil

Current and voltage (d.c. only)

Hairsprings

Eddy current

Moving - iron

Current and voltage (d.c. and a.c.)

Hairsprings

Air

 

  1. (i)  Ammeter application

Current measurement
(ii) Ohmmeter application      
     Impedance measurement
     Resistance measurement
     Insulation resistance measurement
The question was on Measuring Instruments. It was very popular with the candidates. Many candidates that attempted this question could not put complete/right answer in each cell. They could not state the applications of ammeter and ohmmeter.

 

 

 

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