waecE-LEARNING
Basic Electricity Paper 3 , May/June 2014  
Questions:   1 2   Main
General Comments
Weakness/Remedies
Strength





















Question 1

AIM: To determine the resistance of a resistor.

  1. Copy Table 1 into your answer booklet.

Table 1


Resistor Colour Code

Nominal Value

Tolerance Range

Actual Value

R1
Red, Violet,  Red, Gold

 

 

 

R2
Brown, Black, Orange, Gold

 

 

 

  1. Using the colour codes, determine the nominal value of R1 and record in Table 1.
  2. Measure the actual value of the resistor R1 using the digital multimeter and record the result in Table 1.
  3.  Repeat steps (b) and (c) for resistor R2.
  4.  Complete Table 1.

 

_____________________________________________________________________________________________________
Observation

The expected answers were:
(a)                                                                   Table 1
           


Resistor colour code

Nominal value

Tolerance range

Actual value

                  R1
Red, Violet, Red, Gold

 

2.7 kΩ

2.7 kΩ  5%
        OR
2565 Ω to 2835 Ω

 

          2.69 kΩ

                  R2
Brown, Black, Orange, Gold

 

10 kΩ

10 kΩ  5%
       OR
9500 Ω to 10500 Ω

 

         9.82 kΩ

The candidates, as reported, understood the question and carried out the actions required. But unfortunately, some of the candidates did not record accurate voltage and current readings.

          

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