The multiplication product of 20.21 with 20.22 upto four significant figures is
Correct answer: A. 408.6
- A. 408.6
- B. 408.64
- C. 408.6462
- D. 409.0
Explanation
To solve this problem, multiply 20.21 by 20.22 to get approximately 408.6442. To express this result with four significant figures, round it to 408.6. Option A is correct because it uses four significant figures. Option C is incorrect because it does not round the result and exceeds four significant figures. Option D rounds the result to a whole number, which doesn't meet the requirement for four significant figures.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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
The type of error, which is produced by a faulty measuring instrument is called
The CORRECT scientific notation for 100.00 is
Random errors can be reduced byI. taking zero correctionII. taking mean of several measurementsIII. comparing the instrument with another more accurate one
In a champions' trophy of dart match, a player was given three chances to hit the centre target with darts. He managed to hit all the darts close to each other but away from the centre.The given case depicts that the player's shots were
The given diagram shows two different scales on a Vernier callipers. The reading on the Vernier scale is
Which of the given sources of errors will NOT affect your readings while handling the Gravesand's apparatus?