The percentage error in the measurement of mass and speed are 5% or 6% respectively the maximum error in the measurement of K.E is
Correct answer: A. 17%
- A. 17%
- B. 30%
- C. 15%
- D. 90%
Explanation
Kinetic Energy = mv^2/2Percentage Error in KE = Percentage Error in Mass + 2(Percentage Error in Speed) The question states percentage error in mass is 5% and the percentage error in speed is 6%.Putting values in the formula for Percentage Error in KE gives5 + 2(6) = 5 + 12 = 17% which is option A.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Errors and Significant Figures
Measurement errors include random and systematic effects, absolute, fractional and percentage uncertainty, and the precision shown by significant figures. Questions apply rounding rules and uncertainty propagation in addition, subtraction, multiplication and division, while distinguishing accuracy from precision and uncertainty from an actual mistake.
Practise Measurements
262 free Measurements MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Errors and Significant Figures questions
Which experimental teachnique reduces the systematic error of the quantity being investigated?
During a experiment, one measured the mass of a mosquito and found it to be 1.20 x 10^-5 Kg. The numbers of significant figures in this case are:
During the experiment, one measured the mass of mosquito and found it 1.20 x 10^-5 kg. The number of significant figures in this case is:
In a cricket match 500 spectators are counted one by one. How many significant figures will be there in the final result?
In a simple electrical circuit the current in a resistor is measured as (2.50 +_ 0.05) mA. The resistor is marked as having a value of 4.7 _+2%. If these value where used to calculate the power dissipated in the percentage uncertainty in the value obtained ?
The number of significant figures in the measurement x = 10.00300 are: