Physical Quantity

Q.

define unit ?

Q.

Which unit would you prefer to make the measurement of the thickness of your paper?

Q. How many fundamental units are defined in the S.I. system?

1. 4
2. 5
3. 7
4. 9

Q.

Express the speed of $100km/hr$ in $cm/s$.

Q.

Write true or false for the following statement.

$-273°C=0K$

1. True
2. False

Q.

Define the term which measures the rate of motion. Give its SI unit.

Q.

How many units are defined in SI ? Give units of three basic physical quantities

Q.

The temperature at which molecular movement of matter ceases is called

1. Normal temperature.

2. Zero Kelvin.

3. Abnormal temperature.

4. None of these.

Q.

Give one line/one word to answer the following:

(i) Volume of a gas compared to the solid state.

(ii) Standard temperature of a gas in Kelvin.

(iii) Standard pressure of a gas in mm of Hg.

(iv) Celsius temperature of a gas at 300 K

(v) Volume of a gas at -273°C.

Q.

___ quantities have both magnitude and direction.

1. Derived

2. Scalar

3. Fundamental

4. Vector

Q. Which of the following are the fundamental quantities?

1. Acceleration
2. Time
3. Length
4. Mass
5. Current
6. Velocity
7. Force
8. Temperature

Q. Choose the correct statements regarding absolute zero temperature.

1. Water freezes
2. $-{273.15}^{\circ }C$
3. Molecular motion ceases
4. $0K$

Q.

The SI unit of speed is

1. $\raisebox{1ex}{$km$}\!\left/ \!\raisebox{-1ex}{$min$}\right.$

2. $\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$min$}\right.$

3. $\raisebox{1ex}{$km$}\!\left/ \!\raisebox{-1ex}{$h$}\right.$

4. $\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$

Q. Choose the incorrect statement regarding the absolute zero temperature.