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. $\frac{1}{2}<mspace\; width="1em"></mspace>\frac{B^2}{{\mu }_0}$

4. Power

The magnitude of any physical quantity:

Which of the following is not equal to a watt?
1. Joule/second
2. Ampere\(\times\) volt
3. ( Ampere)²\(\times\) ohm
4. Ampere/volt

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 $=N\text{}/\text{}{m}^2$

One second is equal to :

1. 1650763.73 time periods of $Kr$ clock

2. 652189.63 time periods of $Kr$ clock

3. 1650763.73 time periods of $Cs$ clock

4. 9192631770 time periods of $Cs$ clock

The unit of power is :

1. Joule

2. Joule per second only

3. Joule per second and watt both

4. Only watt