Answer:
search-icon-header
Search for questions & chapters
search-icon-image
Class 11
>>Physics
>>Units and Measurement
>>Errors in Measurement
>>You measure two quantities ...
Question
Bookmark
You measure two quantities as A=1.0m±0.2m, B=2.0m±0.2m. We should report correct value for
AB
as
Medium
Solution
verified
Verified by Toppr
Correct option is
D
1.4m±0.2m
Here, A=1.0m±0.2m, B=2.0m±0.2m
AB=(1.0m)(2.0m)=2.0m
2
AB
=
2.0m
=1.414m
Rounding off to two significant figures, we get
AB
=1.4m
AB
ΔAB
=
2
1
(
A
ΔA
+
B
ΔB
)=
2
1
(
1.0
0.2
+
2.0
0.2
)=
2
0.3
Δ
AB
=
2
0.3
×
AB
=
2
0.3
×1.414=0.212m
Rounding off to one significant figure, we get
Δ
AB
=0.2m
The correct value for
AB
is 1.4m±0.2m
The area of the circle is going to be 50.27 because the equation for the area of a circle is pie • r^2 and the radius is 4 feet because radius is half the diameter and the circumference of the circle will be 25.13 because the formula for circumference is 2• pie • r
Option C
The radius of circle is 13 units
<em><u>Solution:</u></em>
<em><u>The equation of circle is given by formula:</u></em>

Where, the center being at the point (h, k) and the radius being "r"
<em><u>Given that circle has its center at the origin</u></em>
(h, k) = (0, 0)
<em><u>(5, -12) is a point on the circle</u></em>
(x, y) = (5, 12)
<em><u>Substituting in equation we get,</u></em>

Thus radius of circle is 13 units
1.
There are 4 possible suits, hearts (H), clubs (C) spades (S) and diamonds (D)
The probability of each suit is 13/52 or 1/4
In the first draw, there will be 4 branches, each leading to one suit and each will have a probability of 1/4.
In the second draw, each of the branches after the first draw will have 4 more branches coming out of them, each will again have a probability of 1/4.
2.
A fair die means that there will be 6 initial branches, with the probability of 1/6 for each.
The toss of a coin means that each branch will have 2 branches in front of it, and each of these branches will lead to either heads or tails, with a 1/2 probability of each.