Which is different from others by units?

1. Phase difference

2. Mechanical equivalent

3. Loudness of sound

4. Poisson's ratio

Length cannot be measured by

1. Fermi

2. Debye

3. Micron

4. Light year

The value of Planck's constant is

1. $6.63\times {10}^{-34}J\text{-}\sec$

2. $6.63\times {10}^{34}J\text{}/\text{}\sec$

3. $6.63\times {10}^{-34}kg\text{-}{m}^2$

4. $6.63\times {10}^{34}kg\text{}/\text{}\sec$

A physical quantity is measured and its value is found to be nu where n = numerical value and u = unit. Then which of the following relations is true

1. $n\propto u^2$

2. $n\propto u$

3. $n\propto \sqrt{u}$

4. $n\propto \frac{1}{u}$

Faraday is the unit of

1. Charge

2. emf

3. Mass

4. Energy

Candela is the unit of

1. Electric intensity

2. Luminous intensity

3. Sound intensity

4. None of these

The unit of reactance is:

1. Ohm

2. Volt

3. Mho

4. Newton

The unit of Planck's constant is:

1. Joule

2. Joule/s

3. Joule/m

4. Joule-s

Number of base SI units is

1. 4

2. 7

3. 3

4. 5

SI unit of permittivity is:

1. $C^2{m}^2{N}^{-1}$

2. $C^{-1}{m}^2{N}^{-2}$

3. $C^2{m}^2{N}^2$

4. $C^2{m}^{-2}{N}^{-1}$