The quantity $\frac{1}{2}{\in }_0{E}^2$ has dimensional formula same as [This question includes concepts from 12th syllabus]

1. $\frac{1}{2}C{V}^2$

2. $\frac{1}{2}L{I}^2$

3. $\frac{1}{2} \frac{B^2}{{\mu }_0}$

4. Power

Newton–second is the unit of  

1. Velocity

2. Angular momentum

3. Momentum

4. Energy

Which of the following is not represented in correct unit  

1. $\frac{\text{Stress}}{\text{Strain}}=N\text{}/\text{}{m}^2$

2. Surface tension = $N\text{}/\text{}m$

3. Energy $=kg\text{-}m\text{}/\text{}\sec$

4. Pressure $=N\text{}/\text{}{m}^2$

A micron is related to centimetre as

1. $1micron={10}^{-8}cm$

2. $1micron={10}^{-6}cm$

3. $1micron={10}^{-5}cm$

4. $1micron={10}^{-4}cm$

The unit of power is :

1. Joule

2. Joule per second only

3. Joule per second and watt both

4. Only watt