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

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

One nanometre is equal to:

(1) ${10}^{9}mm$

(2) ${10}^{-6}cm$

(3) ${10}^{-7}cm$

(4) ${10}^{-9}cm$

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