NCERT Question 7 The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below – Plot a graph between V and I and calculate the resistance of that resistor.
By Ohm’s law
V = I R
∴ R = 𝑉/𝐼
To find resistance,
We find the mean of resistance in the 5 cases
∴ R = (3.2 + 3.4 + 3.35 + 3.4 + 3.3)/5
R = 16.65/5
R = 3.33 Ω

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo

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