Standardising Units

Q.

Distinguish between fundamental and derived units and give examples of derived units.

Q.

Which is not an SI unit?

Q.

Define MKS system.

Q.

A hand-span gives an accurate measurement of length.

1. True
2. False

Q. Match the following:.

1. 2 km
2. 50 mm
3. 70 cm
4. 10 km

Q. Assertion :kilogram is a standard unit of mass. Reason: kilogram is well defined and invariant.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. $2m=$$cm$.

1. $200$
2. $0.002$
3. $20$
4. $2$

Q. $300m=$ $km$

1. $30$
2. $3$
3. $0.3$

Q. Which of these is the best choice for unit of measurement?

1. Metre stick
2. Oranges
3. King's feet
4. Hand's span

Q. Match the following:.

1. 70 cm
2. 50 mm
3. 2 km
4. 10 km

Q. 1 metre can be defined as:

1. Distance travelled by light in (1/299792458) s

2. Foot of a person

3. Either of the above

4. A rod