Question

(11) In an experiment to study the relation between the potential difference across a resistor and the content through it, a
student recorded the following observations
Potential difference 1 (volts)
Current amperes)
1.0-------0.25
2.0----0.65
3.0-----0.75
4.0-----1.0
5.0----1.25
On examining the above observations the teacher asked the student to reject one set of readings as the values were
out of agreement with the rest. Which one of the above sets of readings can be rejected? Calculate the mean value
of resistance of the resistor based on the remaining four sets of readings.​

Answer 1

Answer:

25 ohm

Explanation:

First plot the graph of V Vs. I using the data. You will see that the reading (0.15 A, 4.5V) is different from others. So omit this data. The mean value of the resistance is given by the slope of the V-I curve. It can be calculated as R = ΔV/ΔI = (5−3) V/(0.20− 0.12)A = 25 Ω.