Standardising Length Measurement

Q.

Define derived quantity with example.

Q.

Question 6

The distance between Radha's home and her school is 3250 m. Express this distance in km.

Q.

What is the least count of a commonly used metre scale?

Q.

Define length. Name three instruments used to measure length?

Q.

Why is the use of zero error necessary in measuring instruments?

Q.

Question 5

The height of a person is 1.65 m. Express it in cm and mm.

Q.

Why does a tailor use a measuring tape while a cloth merchant uses a metre scale?

Q.

Question 2 (i)

Fill in the blank:
One metre is ___ cm.

Q. The given figure shows the weight of a watermelon, i.e 2 kg. What do you mean by the given statement?

1. It means that the water melon is 2 times the unit of mass, i.e. kilogram.
2. It means that the water melon is 2 times the unit of mass, i.e. gram.
3. It means that the water melon is 2 times the unit of mass, i.e. milligram
4. It means that the water melon is 2 times the unit of mass, i.e. quintal.

Q.

The unit of volume is derived from the fundamental SI unit of length.

1. True

2. False

Q.

Question 1

The distance between Delhi and Mumbai is usually expressed in units of:

(a) Decametre

(b) Metre

(c) Centimetre

(d) Kilometre

Q.

Measurement is nothing but the comparison of an unknown quantity with a known fixed quantity of the same type.

1. True

2. False

Q. The unit of density of a substance is ___.

1. kilogram per cubic metre.
2. None of these
3. kilogram per square metre.
4. kilogram

Q. Convert : 1000 cubic metres = ___ litres.

Q.

A carpenter uses measuring tape for taking measurements.

Q.

Metric system was introduced in:

1. France

2. England

3. America

4. India

Q.

Scalar Quantities can be added according to the rules of arithmetic.

1. True
2. False

Q.

The unit we use to measure a physical quantity is a matter of choice

1. True
2. False

Q.

Pavan is using a metre scale to measure the length of a rope. Which of the following represent the most appropriate observation?

1. 0.22 m

2. 22 cm

3. 22.00 cm

4. 22.0 cm

Q. Ram has to attend a birthday party of his best friend - Sam. He asks his mum where Sam's home is, and she says he lives 2 km away from their home. But, how far is 2 km exactly? Can you tell how many millimetres make a kilometre?

1. 

2. 

3. 

4. 

Q.

Which of the following is not a fundamental unit?

1. metre
2. kilogram
3. kelvin
4. cubic metre

Q. One metre equals to ___ millimetres.

1. 10
2. 1000
3. 100
4. 100000

Q.

What is the SI unit of time?

Q. Which of the following is a better estimate for the capacity of a bottle of water?

1. 5 millimeter
2. 15 kilometer
3. 15 centimeter
4. 5 meter

Q. The length of a tube is $5643mm$. What would be its length when expressed in S.I. units?

1. $56cm$
2. $5.3m$
3. $5.643m$
4. $5m$

Q. what is volumetricmethod for estimation of very small distances

Q. According to conversion of units of measurement:
$1kg$ = ____ $grams$

1. $0.1$
2. $10$
3. $1000$
4. $100$

Q.

10 m = ___.

1. 100 cm

2. 1000 cm

3. 10000 cm

4. 10 cm

Q. Choose the smallest value from the options.

1. 1 m
2. 1 cm
3. 1 mm
4. 1 km

Q. Metre is the SI unit of

1. mass
2. length
3. volume
4. area