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Dear Student

 

You have posted multiple queries in one question. One of them is being answered. Kindly put the other one as a separate question.

 

Q2. We can figure out the anomalous reading by calculating the Resistance (V/i) in each case. Resistance for V=4.5, i = 0.15 is 30 ohms which is different from that for the rest of the combinations (25 ohms). hence this reading must be discarded.

 

Mean value of resistance based on the remaining sets:

R1 = 2/0.08 = 25

R2 = 3/0.12 = 25

R3 = 5/0.2   = 25

R4 = 6/0.24 = 25

 

Mean = 25 ohms

 

Hope that helps in answering your query.

 

Team

TopperLearning