If \(u_1\) and \(u_2\) are the units selected in two systems of measurement and \(n_1\) and \(n_2\) are their numerical values, then:

1.	\(n_1u_1=n_2u_2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \)
2.	\(n_1u_1+n_2u_2=0\)
3.	\(n_1n_2=u_1u_2\)
4.	\((n_1+u_1)=(n_2+u_2)\)

1 eV is 

1. Same as one joule

2. $1.6\times {10}^{-19}J$

3. 1 V

4. $1.6\times {10}^{-19}C$

$1kWh=$

1. $1000W$

2. $36\times {10}^{5}J$

3. $1000J$

4. $3600J$

Universal time is based on :

1. Rotation of the earth on its axis

2. Earth's orbital motion around the Sun

3. Vibrations of cesium atom

4. Oscillations of quartz crystal

Unit of moment of inertia in MKS system 

1. $kg\times c{m}^2$

2. $kg/c{m}^2$

3. $kg\times m^2$

4. $Joule\times m$

Unit of stress is: 
1. \(\frac{\text{N}}{\text{m}}\)
2. \(\text{N-m}\)
3. \(\frac{\text{N}}{\text{m}^2}\)
4. \(\text{N-m}^2\)

Unit of magnetic moment is

1. $Ampere\text{}-\text{}metr{e}^2$

2. $Ampere\text{}-\text{}metre$

3. $Weber\text{}-\text{}metr{e}^2$

4. $Weber\text{}/\text{}metre$

Curie is a unit of 

1. Energy of $\gamma$-rays

2. Half life

3. Radioactivity

4. Intensity of $\gamma$-rays

Hertz is the unit of

1. Frequency

2. Force

3. Electric charge

4. Magnetic flux

One pico Farad is equal to

1. ${10}^{-24}F$

2. ${10}^{-18}F$

3. ${10}^{-12}F$

4. ${10}^{-6}F$