Motion and Measurement of Distances Test

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Motion and Measurement of Distances Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a characteristic of the standard unit?

A
It should be of convenient size

B
It should change with respect to space and time

C
It should not be perishable

D
It should be easily reproducible

Solution

A standard unit is the one which can be measured conveniently but must not change with space and time i.e. it should remain same with respect to space and time.
Question 2
1 / -0

CNG is preferred over petrol as a fuel for transport vehicles. Why?

A
It is a renewable source of energy

B
It is less polluting

C
It can be compressed under high pressure

D
It undergoes complete combustion

Solution

CNG (compressed natural gas) is the cleanest of all fossil fuels. It produces harmless gases as compared to petrol, coal, or diesel to the environment. Hence CNG is preferred over petrol coal and diesel. It is also not very costly as compared to petrol and diesel.
Question 3
1 / -0

In the fig below, the length of the object is:

A
3.4 units

B
3.5 units

C
3.6 units

D
3.3 units

Solution

There are 10 divisions in between 1 unit. So each division is $$1/10=0.1 $$ unit.
In the figure, the starting point of the object is zero and the final end of the object is coinciding with 35 marks.
Thus, the length of the object will be ($$35\times 0.1$$)= $$3.5$$ units.
Question 4
1 / -0

Rectilinear motion is a motion that occurs in :

A
Straight line

B
Plane

C
Both A and B

D
None

Solution

The rectilinear motion is a straight line motion or one dimensional motion.
Question 5
1 / -0

The comparison of an unknown quantity with a known constant quantity is known as :

A
Unit

B
Scale

C
Magnitude

D
Measurement

Solution

The standard quantity (constant quantity) used for comparison is called unit. Measurement is the comparison of an unknown quantity with a known standard quantity (constant quantity) or unit.
Question 6
1 / -0

Smallest division of a metre scale is known as:

A
Millimetre

B
Metre

C
Centimetre

D
Decimetre

Solution

Length is measured by using a metre scale. A metre scale is divided into $$100$$ parts, called centimetres. Each centimetre is further divided into $$10$$ parts known as millimetres.
Question 7
1 / -0

Metre scale have bevelled edges because:

A
To increase the grip between scale and the measured surface

B
To avoid errors due to parallax

C
To look good

D
None of these

Solution

Parallax error occurs when the measurement of an object's length is more or less than the true length because of your eye being positioned at an angle to the measurement markings.
Question 8
1 / -0

The green rectangular-shaped object pictured below is being measured. Its left end is perfectly lined up with $$0\ m$$ on the measuring tape.
Which of the following is the best and most precise length of the green, rectangular-shaped object that can be obtained, using the measuring tape?

A
$$2.0\ m$$

B
$$2.4\ m$$

C
$$2.37\ m$$

D
$$2.377\ m$$

E
$$2.5\ m$$

Solution

Least count of the measuring tape $$LC = 0.1$$ m
From figure, the end of the green rectangular object lies between $$2.3$$ m and $$2.4$$ m but it is very close to $$2.4$$ m.
Hence the length of the object is $$2.4$$ $$m$$
Question 9
1 / -0

The standard quantity used for comparison is called a _______.

A
Unit

B
Quality

C
Pick

D
Coin

Solution

The measurement means the comparison of an unknown quantity with some known quantity. This known fixed quantity is called a unit.
Question 10
1 / -0

The length of a curved surface is measured by using

A
metre scale only

B
thread only

C
both metre scale and thread

D
none of these

Solution

For the measuring of length of a curved surface, first take the measure of length using a thread and then find out the numerical value of that length of thread using scale. This numerical value will give the length of the curved surface. Thus, both thread and scale are used to find out the length of a curved surface.

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Re-Attempt Weekly Quiz Competition

Motion and Measurement of Distances Test - 15

Result

Motion and Measurement of Distances Test - 15

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SHARING IS CARING

Question 1

It should be of convenient size

It should change with respect to space and time

It should not be perishable

It should be easily reproducible

Solution

Question 2

It is a renewable source of energy

It is less polluting

It can be compressed under high pressure

It undergoes complete combustion

Solution

Question 3

3.4 units

3.5 units

3.6 units

3.3 units

Solution

Question 4

Straight line

Plane

Both A and B

None

Solution

Question 5

Unit

Scale

Magnitude

Measurement

Solution

Question 6

Millimetre

Metre

Centimetre

Decimetre

Solution

Question 7

To increase the grip between scale and the measured surface

To avoid errors due to parallax

To look good

None of these

Solution

Question 8

$$2.0\ m$$

$$2.4\ m$$

$$2.37\ m$$

$$2.377\ m$$

$$2.5\ m$$

Solution

Question 9

Unit

Quality

Pick

Coin

Solution

Question 10

metre scale only

thread only

both metre scale and thread

none of these

Solution

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