Test Details

Units and Measurement: Error Analysis

Jan 20, 2:00 PM

90 minutes

Jan 20, 3:30 PM

50.0 marks

MCQ

50 questions

subodh kumar

MSc.(MATH) , B. Ed, CTET-2019, STET-2019

Class Details

Maths

Physics

Chemistry

Biology

English

Hindi

PIONEER ACADEMY 11th(ISc)

Maths

Physics

Chemistry

Biology

English

Hindi

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Question Text

Question 1 :
A student measure the thickness of an object by three different instruments and gets the result as 0.5 cm, 0.50 cm, 0.500 cm. State the one which is more accurate.

Question 2 :
In lab one student obtained a weight measurement of $3.2 kg$ for a given substance, but the actual or known weight is $10 kg$, then his measurement is :

Question 3 :
Weight of a body is a scalar quantity. True or false.

Question 5 :
A body is lying on the surface of earth.Suppose that the earth suddenly loses its power of attraction, then:

Question 8 :
The mass of an object is measured by two students (true weight is 12 kg)<br><u>Student 1:</u> He measures 12 kg<br><u>Student 2:</u> She measures 12.5 kg<br>Measurement of which student is more accurate.

Question 9 :
When the number 0.046508 is reduced to 4 significant figures, then it becomes :

Question 11 :
A stone is attached at the end of a spring balance. The pointer shows 5 kg wt. Now the spring balance is released such that it is free to fall under the effect of gravity, the pointer will now give a reading equivalent to

Question 12 :
Two balls of masses in ratio $1 : 2$ are dropped from the same height. Find the ratio of the forces acting on them during motion.

Question 17 :
When 13546 is rounded off to four significant figures, it becomes :

Question 19 :
<div>Freely falling objects fall with the same acceleration while neglecting air resistance because:</div>

Question 21 :
What is the base unit for measuring distance in the metric system?

Question 22 :
With due regards to significant figures $ 5.4 \times 0.125$ is equal to:<br/>

Question 24 :
How much mass (approximately) of a body one can hold, when a force of 1N is applied on it ?

Question 25 :
Which scale is best for measuring the length of a ladybug?

Question 28 :
The diameter of a cylinder is $0.55$ cm, its length is $1.35$ cm. Its volume is_______${ cm }^{ 3 }$.

Question 29 :
At what temperature will both celsius and fahrenheit scales read the same value?<br>

Question 32 :
Two numbers are given as i) 20.96 and ii) 0.0003125. Rounding off above numbers to 3 significant figures will lead to :

Question 34 :
For$ { N }_{ 2 }{ O }_{ 4 }\rightleftharpoons { 2NO }_{ 2 }$, ${ K }_{ p }=X$ when initial pressure of ${ N }_{ 2 }{ O }_{ 4 }$ is 2 atm. If the initial pressure of ${ N }_{ 2 }{ O }_{ 4 }$ at same $T$ is $6\ atm$, ${ K }_{p }$ is:

Question 35 :
What is the mass of an object whose weight is 980 N?

Question 36 :
When a body rests on a surface, it exerts a force equal to its weight.

Question 38 :
Assertion: Nowadays a standard metre is defined as in terms of the speed of light. Reason: Light has no relation with length

Question 40 :
The accuracy in the measurement of the diameter of hydrogen atom measured as $1.06 \times { 10 }^{ -10 }$ m is :

Question 41 :
The prefix used for denoting an order of magnitude of $\displaystyle { 10 }^{ 6 }$ is ___________.

Question 44 :
State whether the following statement is True or False. <div>The prefix used for $\displaystyle { 10 }^{ 3 }$ is kilo.</div>

Question 45 :
The mathematical operation in which the accuracy is limited to least accurate term is :

Question 46 :
When a force is expressed in dyne, the number of significant figures is four. If it is expressed in newton, the number of significant figures will become:<div>(Given: ${ 10 }^{ 5 }\ dyne=1\ N$)</div>

Question 47 :
Which of the following numbers has least number of significant figures?

Question 48 :
The value of $\sqrt { 2 } $ in correct significant digits is :

Question 49 :
Subtract $0.2\;J$ from $7.26\;J$ and express the result with correct number of significant figures.

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