SI Units

Q.

Define one metre, the S.I. unit of length. And state its one multiple and one submultiple.

Q.

The modern unit of intensity of light is:

1. watt

2. foot candle

3. lux

4. none of the above

Q.

What is the S.I unit for the amount of substance.

Q.

Which of the following Physical quantity is a fundamental physical quantity?

1. Volume

2. Speed

3. Area

4. Length

Q. Which of the following is the SI unit of velocity?

1. $m{s}^{-3}$
2. $m{s}^{-1}$
3. $ms$
4. $s^2$

Q.

The SI unit for angular velocity is

1. $m/s$

2. $rad$

3. $rad/s$

4. $m/rad$

Q.

The old unit of intensity of light is:

1. inch candle

2. yard candle

3. foot candle

4. none of the above

Q. The SI unit of amount of substance is:

Q.

If the SI unit of mass is taken to be g

If the SI unit of distance is taken to be km

If the SI unit of time is taken to be s

What will be the expression for SI unit of intensity?

1. $\frac{g}{s^2}km$

2. $\frac{g}{s^3}km$

3. $\frac{g}{s^3}$

4. $\frac{km}{s^3}$

Q. Convert100 joule into a new system whose basic units are 1000 g 10 m and 10 minutes

Q. In MKS system, the length is measured in _____.

1. kilometre
2. millimetre
3. centimetre
4. metre

Q.

The units of speed and velocity are different.

1. True
2. False

Q. The base S.I. unit of length is ________.

1. metre
2. centimetre
3. kilometre
4. millimetre

Q. Mention any four fundamental quantities and write their SI units.
[ 2 Marks]

Q. To form a system of units, we require a minimum of 3 physical quantities.

1. False
2. True

Q. Mention any four fundamental quantities and write their SI units.
[ 2 Marks]

Q. Which of the following is not a fundamental SI unit?

1. metre
2. gram
3. second
4. candela

Q. Which of the following is not the correct representation of S.I. units?

1. $5m$ of cloth
2. $20s$ time interval
3. $2lb$ of carrots
4. $2kg$ of cooking oil

Q.

What are the requirements for selecting a unit of a physical quantity?

Q. S.I. unit for measuring angle is ________.

1. ampere
2. kelvin
3. radian
4. candela

Q. S.I. unit of temperature is ________.

1. gram
2. metre
3. Kelvin
4. pound

Q. The SI unit of volume is ________.

1. m
2. $m^{-2}$
3. $m^3$
4. $m^{-3}$