What is the total resistance in the above diagram

JAMB 1980

What is the total resistance in the above diagram

What is the total resistance in the above diagram

A. 5 ohms

B. 15 ohms

C. 25 ohms

D. 35 ohms

E. 45 ohms

Correct Answer: Option C


It is given that both the resistances R2 are connected in parallel R(parallel). Hence Total Resistance for the parallel is given by

1/R = 1/R2 + 1/R2

1/R = 1/10 + 1/10

1/R = 2/10

By further simplification it’ll be discovered that R(parallel)=5

Now, another look at the diagram and it’s given that a pair of resistances R1 are connected in series. Hence, Total resistance for series will be given as


R = 10+10

Therefore R(series) = 20

Recall that R(parallel) = 5

So Total resistance will be the summation of both resistances

Which leaves us with the final answer, 25

Explain your answer in the comment box below and let’s have a discussion so as to have a great understanding of this question!



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About Teezab 1349 Articles
His Name is Tiamiyu Abdulbazeet Olawale. He is a student at the University of Ilorin studying Electrical and Electronics Engineering. He likes to give the latest updates about Nigeria and international institutions as he aims at helping people to lay their hands on the right information.

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