Physics And Measurement Question 177

Question: The resistance R = $ \frac{V}{i} $ where V= 100 $ \pm $ 5 volts and i = 10 $ \pm $ 0.2 amperes. What is the total error in R

Options:

A) 5%

B) 7%

C) 5.2%

D) $ \frac{5}{2} $ %

Show Answer

Answer:

Correct Answer: B

Solution:

$ \therefore $ $ {{( \frac{\Delta R}{R}\times 100 )} _{\max }}=\frac{\Delta V}{V}\times 100+\frac{\Delta I}{I}\times 100 $

$ =\frac{5}{100}\times 100+\frac{0.2}{10}\times 100 $

$ =(5+2)$ % = 7%



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक