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  • Where is the resistance  with <img alt="V=100\pm5"

Where is the resistance  R=\ \frac{V}{i} with V=100\pm5 volts and  amperes  i=10\pm0.2. What is the total error in R:

Option: 1

5%


Option: 2

7%


Option: 3

5.2%


Option: 4

\frac{5}{2}%


Answers (1)

best_answer

\left ( \frac{\Delta R}{R} \times 100\right )_{max}=\frac{\Delta V}{V}\times 100+\frac{\Delta i}{i}\times 100

Or, \frac{5}{100}\times100\ +\frac{2}{100}\times100

Or, \left(5+2\right)=7%

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