Why does the thermometer in the black paper show a greater increase in temperature than the others?
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Ответ:
i see no paper...and hi meh name serenity :p
Explanation:
Ответ:
According to what I've learnt, in any expression of multiplication or division, the percentage errors of each term are added up to find the equivalent percentage error. That is, if
y=ABCy=ABCthen% error in y= % error in A + % error in B + % error in C
For the above problem, let Rs denote series combination. Then Rs=300±7 ohm.
Let Rp denote parallel combination.
∴Rp=R1R2/R1+R2 = R1R2/RsIgnoring errors, we get Rp=200/3 = 66.67 ohm
%error in R1=3, %error in R2=2, %error in Rs=7/3
Hence, %error in Rp=3+2+7/3=22/3
So, error in Rp will be 22/3% of 200/3, which is approximately 4.89.
Hence, I got Rp=66.67±4.89 ohm.
However, the book used the formula described and proved here and arrived at the answer Rp=66.67±1.8ohm.