**In fig 8 the value of R is**

**A. 3****Ω**

**B. 6****Ω**

**C. 4****Ω**

**D. 5****Ω**

**QUICK ANSWER…**

**B**

**DETAILS…**** **** **

**To solve this, we need to solve for the effective resistance of the whole circuit, and then use the supplied voltage and ammeter reading to solve for R.**

**To find the effective resistance, observe that 6****Ω**** and R are in parallel and these two in series with the 3****Ω**** resistor.**

**Firstly, resolving the parallel 6****Ω**** and R, we have the effective resistance X as:**

**Now for the right answer to the above question:**

**A is not the right answer.****B is correct.****C is incorrect.****D is incorrect. not vaporization point.**

**KEY-POINTS…**

**You may please note this/these:**

**Use the given voltage and current to calculate the value of R.****Get the expression for R by finding the effective resistance of the arrangement.**

**You are free to add your own answers below this page to assist others improve their learning.**

**You can also click the golden ASK A QUESTION BOTTON down this page to raise new related questions… OUR COMMUNITY OF EXPERTS WILL BE MORE THAN HAPPY TO TACKLE IT…**

**/ culled from 2020 JAMB-UTME physics past question 36 /**